Support large organization sync (#1311)

* Increase organization max seat size from 30k to 2b (#1274)

* Increase organization max seat size from 30k to 2b

* PR review. Do not modify unless state matches expected

* Organization sync simultaneous event reporting (#1275)

* Split up azure messages according to max size

* Allow simultaneous login of organization user events

* Early resolve small event lists

* Clarify logic

Co-authored-by: Chad Scharf <3904944+cscharf@users.noreply.github.com>

* Improve readability

This comes at the cost of multiple serializations, but the
 improvement in wire-time should more than make up for this
 on message where serialization time matters

Co-authored-by: Chad Scharf <3904944+cscharf@users.noreply.github.com>

* Queue emails (#1286)

* Extract common Azure queue methods

* Do not use internal entity framework namespace

* Prefer IEnumerable to IList unless needed

All of these implementations were just using `Count == 1`,
which is easily replicated. This will be used when abstracting Azure queues

* Add model for azure queue message

* Abstract Azure queue for reuse

* Creat service to enqueue mail messages for later processing

Azure queue mail service uses Azure queues.
Blocking just blocks until all the work is done -- This is
how emailing works today

* Provide mail queue service to DI

* Queue organization invite emails for later processing

All emails can later be added to this queue

* Create Admin hosted service to process enqueued mail messages

* Prefer constructors to static generators

* Mass delete organization users (#1287)

* Add delete many to Organization Users

* Correct formatting

* Remove erroneous migration

* Clarify parameter name

* Formatting fixes

* Simplify bump account revision sproc

* Formatting fixes

* Match file names to objects

* Indicate if large import is expected

* Early pull all existing users we were planning on inviting (#1290)

* Early pull all existing users we were planning on inviting

* Improve sproc name

* Batch upsert org users (#1289)

* Add UpsertMany sprocs to OrganizationUser

* Add method to create TVPs from any object.

Uses DbOrder attribute to generate.
Sproc will fail unless TVP column order matches that of the db type

* Combine migrations

* Correct formatting

* Include sql objects in sql project

* Keep consisten parameter names

* Batch deletes for performance

* Correct formatting

* consolidate migrations

* Use batch methods in OrganizationImport

* Declare @BatchSize

* Transaction names limited to 32 chars

Drop sproc before creating it if it exists

* Update import tests

* Allow for more users in org upgrades

* Fix formatting

* Improve class hierarchy structure

* Use name tuple types

* Fix formatting

* Front load all reflection

* Format constructor

* Simplify ToTvp as class-specific extension

Co-authored-by: Chad Scharf <3904944+cscharf@users.noreply.github.com>

src/Admin/HostedServices/AzureQueueMailHostedService.cs

@@ -0,0 +1,107 @@
+using System;
+using Microsoft.Extensions.Hosting;
+using Azure.Storage.Queues;
+using Microsoft.Extensions.Logging;
+using Bit.Core.Settings;
+using System.Threading.Tasks;
+using System.Threading;
+using Bit.Core.Services;
+using Newtonsoft.Json;
+using Bit.Core.Models.Mail;
+using Azure.Storage.Queues.Models;
+using System.Linq;
+using System.Collections.Generic;
+using Newtonsoft.Json.Linq;
+
+namespace Bit.Admin.HostedServices
+{
+    public class AzureQueueMailHostedService : IHostedService
+    {
+        private readonly ILogger<AzureQueueMailHostedService> _logger;
+        private readonly GlobalSettings _globalSettings;
+        private readonly IMailService _mailService;
+        private CancellationTokenSource _cts;
+        private Task _executingTask;
+
+        private QueueClient _mailQueueClient;
+
+        public AzureQueueMailHostedService(
+            ILogger<AzureQueueMailHostedService> logger,
+            IMailService mailService,
+            GlobalSettings globalSettings)
+        { 
+            _logger = logger;
+            _mailService = mailService;
+            _globalSettings = globalSettings;
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+            _executingTask = ExecuteAsync(_cts.Token);
+            return _executingTask.IsCompleted ? _executingTask : Task.CompletedTask;
+        }
+
+        public async Task StopAsync(CancellationToken cancellationToken)
+        {
+            if (_executingTask == null)
+            {
+                return;
+            }
+            _cts.Cancel();
+            await Task.WhenAny(_executingTask, Task.Delay(-1, cancellationToken));
+            cancellationToken.ThrowIfCancellationRequested();
+        }
+
+        private async Task ExecuteAsync(CancellationToken cancellationToken)
+        {
+            _mailQueueClient = new QueueClient(_globalSettings.Mail.ConnectionString, "mail");
+
+            QueueMessage[] mailMessages;
+            while (!cancellationToken.IsCancellationRequested)
+            {
+                if (!(mailMessages = await RetrieveMessagesAsync()).Any())
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(15));
+                }
+
+                foreach (var message in mailMessages)
+                {
+                    try
+                    {
+                        var token = JToken.Parse(message.MessageText);
+                        if (token is JArray)
+                        {
+                            foreach (var mailQueueMessage in token.ToObject<List<MailQueueMessage>>())
+                            {
+                                await _mailService.SendEnqueuedMailMessageAsync(mailQueueMessage);
+                            }
+                        }
+                        else if (token is JObject)
+                        {
+                            var mailQueueMessage = token.ToObject<MailQueueMessage>();
+                            await _mailService.SendEnqueuedMailMessageAsync(mailQueueMessage);
+                        }
+                    }
+                    catch (Exception e)
+                    {
+                        _logger.LogError(e, "Failed to send email");
+                        // TODO: retries?
+                    }
+                    
+                    await _mailQueueClient.DeleteMessageAsync(message.MessageId, message.PopReceipt);
+
+                    if (cancellationToken.IsCancellationRequested)
+                    {
+                        break;
+                    }
+                }
+            }
+        }
+
+        private async Task<QueueMessage[]> RetrieveMessagesAsync()
+        {
+            return (await _mailQueueClient.ReceiveMessagesAsync(maxMessages: 32))?.Value ?? new QueueMessage[] { };
+        }
+    }
+}

src/Admin/Jobs/DeleteSendsJob.cs

@@ -6,7 +6,6 @@ using Bit.Core.Context;
 using Bit.Core.Jobs;
 using Bit.Core.Repositories;
 using Bit.Core.Services;
-using Microsoft.EntityFrameworkCore.Internal;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Quartz;

src/Admin/Models/OrganizationEditModel.cs

@@ -67,7 +67,7 @@ namespace Bit.Admin.Models
         [Display(Name = "Plan Name")]
         public string Plan { get; set; }
         [Display(Name = "Seats")]
-        public short? Seats { get; set; }
+        public int? Seats { get; set; }
         [Display(Name = "Max. Collections")]
         public short? MaxCollections { get; set; }
         [Display(Name = "Policies")]

src/Admin/Startup.cs

@@ -90,6 +90,10 @@ namespace Bit.Admin
                 {
                     services.AddHostedService<HostedServices.AmazonSqsBlockIpHostedService>();
                 }
+                if (CoreHelpers.SettingHasValue(globalSettings.Mail.ConnectionString))
+                {
+                    services.AddHostedService<HostedServices.AzureQueueMailHostedService>();
+                }
             }
         }
 

src/Api/Controllers/OrganizationsController.cs

@@ -418,7 +418,7 @@ namespace Bit.Api.Controllers
         [HttpPost("{id}/import")]
         public async Task Import(string id, [FromBody]ImportOrganizationUsersRequestModel model)
         {
-            if (!_globalSettings.SelfHosted &&
+            if (!_globalSettings.SelfHosted && !model.LargeImport &&
                 (model.Groups.Count() > 2000 || model.Users.Count(u => !u.Deleted) > 2000))
             {
                 throw new BadRequestException("You cannot import this much data at once.");

src/Api/Public/Controllers/OrganizationController.cs

@@ -41,7 +41,7 @@ namespace Bit.Api.Public.Controllers
         [ProducesResponseType(typeof(ErrorResponseModel), (int)HttpStatusCode.BadRequest)]
         public async Task<IActionResult> Import([FromBody]OrganizationImportRequestModel model)
         {
-            if (!_globalSettings.SelfHosted &&
+            if (!_globalSettings.SelfHosted && !model.LargeImport &&
                 (model.Groups.Count() > 2000 || model.Members.Count(u => !u.Deleted) > 2000))
             {
                 throw new BadRequestException("You cannot import this much data at once.");

src/Core/Models/Api/Public/Request/OrganizationImportRequestModel.cs

@@ -20,6 +20,10 @@ namespace Bit.Core.Models.Api.Public
         /// </summary>
         [Required]
         public bool? OverwriteExisting { get; set; }
+        /// <summary>
+        /// Indicates an import of over 2000 users and/or groups is expected
+        /// </summary>
+        public bool LargeImport { get; set; } = false;
 
         public class OrganizationImportGroupRequestModel
         {

src/Core/Models/Api/Request/Organizations/ImportOrganizationUsersRequestModel.cs

@@ -11,6 +11,7 @@ namespace Bit.Core.Models.Api
         public Group[] Groups { get; set; }
         public User[] Users { get; set; }
         public bool OverwriteExisting { get; set; }
+        public bool LargeImport { get; set; }
 
         public class Group
         {

src/Core/Models/Api/Request/Organizations/OrganizationCreateRequestModel.cs

@@ -24,8 +24,8 @@ namespace Bit.Core.Models.Api
         public OrganizationKeysRequestModel Keys { get; set; }
         public PaymentMethodType? PaymentMethodType { get; set; }
         public string PaymentToken { get; set; }
-        [Range(0, double.MaxValue)]
-        public short AdditionalSeats { get; set; }
+        [Range(0, int.MaxValue)]
+        public int AdditionalSeats { get; set; }
         [Range(0, 99)]
         public short? AdditionalStorageGb { get; set; }
         public bool PremiumAccessAddon { get; set; }

src/Core/Models/Api/Request/Organizations/OrganizationUpgradeRequestModel.cs

@@ -9,8 +9,8 @@ namespace Bit.Core.Models.Api
         [StringLength(50)]
         public string BusinessName { get; set; }
         public PlanType PlanType { get; set; }
-        [Range(0, double.MaxValue)]
-        public short AdditionalSeats { get; set; }
+        [Range(0, int.MaxValue)]
+        public int AdditionalSeats { get; set; }
         [Range(0, 99)]
         public short? AdditionalStorageGb { get; set; }
         public bool PremiumAccessAddon { get; set; }

src/Core/Models/Api/Response/OrganizationResponseModel.cs

@@ -58,7 +58,7 @@ namespace Bit.Core.Models.Api
         public string BillingEmail { get; set; }
         public PlanResponseModel Plan { get; set; }
         public PlanType PlanType { get; set; }
-        public short? Seats { get; set; }
+        public int? Seats { get; set; }
         public short? MaxCollections { get; set; }
         public short? MaxStorageGb { get; set; }
         public bool UsePolicies { get; set; }

src/Core/Models/Api/Response/PlanResponseModel.cs

@@ -67,7 +67,7 @@ namespace Bit.Core.Models.Api
         public short? MaxUsers { get; set; }
 
         public bool HasAdditionalSeatsOption { get; set; }
-        public short? MaxAdditionalSeats { get; set; }
+        public int? MaxAdditionalSeats { get; set; }
         public bool HasAdditionalStorageOption { get; set; }
         public short? MaxAdditionalStorage { get; set; }
         public bool HasPremiumAccessOption { get; set; }

src/Core/Models/Business/OrganizationLicense.cs

@@ -100,7 +100,7 @@ namespace Bit.Core.Models.Business
         public bool Enabled { get; set; }
         public string Plan { get; set; }
         public PlanType PlanType { get; set; }
-        public short? Seats { get; set; }
+        public int? Seats { get; set; }
         public short? MaxCollections { get; set; }
         public bool UsePolicies { get; set; }
         public bool UseSso { get; set; }

src/Core/Models/Business/OrganizationUpgrade.cs

@@ -6,7 +6,7 @@ namespace Bit.Core.Models.Business
     {
         public string BusinessName { get; set; }
         public PlanType Plan { get; set; }
-        public short AdditionalSeats { get; set; }
+        public int AdditionalSeats { get; set; }
         public short AdditionalStorageGb { get; set; }
         public bool PremiumAccessAddon { get; set; }
         public TaxInfo TaxInfo { get; set; }

src/Core/Models/Business/ReferenceEvent.cs

@@ -42,7 +42,7 @@ namespace Bit.Core.Models.Business
 
         public PlanType? PlanType { get; set; }
 
-        public short? Seats { get; set; }
+        public int? Seats { get; set; }
 
         public short? Storage { get; set; }
 

src/Core/Models/Mail/IMailQueueMessage.cs

@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+
+namespace Bit.Core.Models.Mail
+{
+    public interface IMailQueueMessage
+    {
+        string Subject { get; set; }
+        IEnumerable<string> ToEmails { get; set; }
+        IEnumerable<string> BccEmails { get; set; }
+        string Category { get; set; }
+        string TemplateName { get; set; }
+        object Model { get; set; }
+    }
+}

src/Core/Models/Mail/MailQueueMessage.cs

@@ -0,0 +1,26 @@
+using System.Collections.Generic;
+
+namespace Bit.Core.Models.Mail
+{
+    public class MailQueueMessage : IMailQueueMessage
+    {
+        public string Subject { get; set; }
+        public IEnumerable<string> ToEmails { get; set; }
+        public IEnumerable<string> BccEmails { get; set; }
+        public string Category { get; set; }
+        public string TemplateName { get; set; }
+        public object Model { get; set; }
+
+        public MailQueueMessage() { }
+
+        public MailQueueMessage(MailMessage message, string templateName, object model)
+        {
+            Subject = message.Subject;
+            ToEmails = message.ToEmails;
+            BccEmails = message.BccEmails;
+            Category = string.IsNullOrEmpty(message.Category) ? templateName : message.Category;
+            TemplateName = templateName;
+            Model = model;
+        }
+    }
+}

src/Core/Models/StaticStore/Plan.cs

@@ -17,7 +17,7 @@ namespace Bit.Core.Models.StaticStore
         public short? MaxUsers { get; set; }
 
         public bool HasAdditionalSeatsOption { get; set; }
-        public short? MaxAdditionalSeats { get; set; }
+        public int? MaxAdditionalSeats { get; set; }
         public bool HasAdditionalStorageOption { get; set; }
         public short? MaxAdditionalStorage { get; set; }
         public bool HasPremiumAccessOption { get; set; }

src/Core/Models/Table/Organization.cs

@@ -23,7 +23,7 @@ namespace Bit.Core.Models.Table
         public string BillingEmail { get; set; }
         public string Plan { get; set; }
         public PlanType PlanType { get; set; }
-        public short? Seats { get; set; }
+        public int? Seats { get; set; }
         public short? MaxCollections { get; set; }
         public bool UsePolicies { get; set; }
         public bool UseSso { get; set; }

src/Core/Repositories/IEventRepository.cs

@@ -17,6 +17,6 @@ namespace Bit.Core.Repositories
         Task<PagedResult<IEvent>> GetManyByCipherAsync(Cipher cipher, DateTime startDate, DateTime endDate,
             PageOptions pageOptions);
         Task CreateAsync(IEvent e);
-        Task CreateManyAsync(IList<IEvent> e);
+        Task CreateManyAsync(IEnumerable<IEvent> e);
     }
 }

src/Core/Repositories/IOrganizationUserRepository.cs

@@ -15,6 +15,7 @@ namespace Bit.Core.Repositories
         Task<ICollection<OrganizationUser>> GetManyByUserAsync(Guid userId);
         Task<ICollection<OrganizationUser>> GetManyByOrganizationAsync(Guid organizationId, OrganizationUserType? type);
         Task<int> GetCountByOrganizationAsync(Guid organizationId, string email, bool onlyRegisteredUsers);
+        Task<IEnumerable<string>> SelectKnownEmailsAsync(Guid organizationId, IEnumerable<string> emails, bool onlyRegisteredUsers);
         Task<OrganizationUser> GetByOrganizationAsync(Guid organizationId, Guid userId);
         Task<Tuple<OrganizationUser, ICollection<SelectionReadOnly>>> GetByIdWithCollectionsAsync(Guid id);
         Task<OrganizationUserUserDetails> GetDetailsByIdAsync(Guid id);
@@ -26,10 +27,14 @@ namespace Bit.Core.Repositories
         Task<OrganizationUserOrganizationDetails> GetDetailsByUserAsync(Guid userId, Guid organizationId,
             OrganizationUserStatusType? status = null);
         Task UpdateGroupsAsync(Guid orgUserId, IEnumerable<Guid> groupIds);
+        Task UpsertManyAsync(IEnumerable<OrganizationUser> organizationUsers);
         Task CreateAsync(OrganizationUser obj, IEnumerable<SelectionReadOnly> collections);
+        Task CreateManyAsync(IEnumerable<OrganizationUser> organizationIdUsers);
         Task ReplaceAsync(OrganizationUser obj, IEnumerable<SelectionReadOnly> collections);
+        Task ReplaceManyAsync(IEnumerable<OrganizationUser> organizationUsers);
         Task<ICollection<OrganizationUser>> GetManyByManyUsersAsync(IEnumerable<Guid> userIds);
         Task<ICollection<OrganizationUser>> GetManyAsync(IEnumerable<Guid> Ids);
+        Task DeleteManyAsync(IEnumerable<Guid> userIds);
         Task<OrganizationUser> GetByOrganizationEmailAsync(Guid organizationId, string email);
     }
 }

src/Core/Repositories/SqlServer/EventRepository.cs

@@ -74,14 +74,14 @@ namespace Bit.Core.Repositories.SqlServer
             await base.CreateAsync(ev);
         }
 
-        public async Task CreateManyAsync(IList<IEvent> entities)
+        public async Task CreateManyAsync(IEnumerable<IEvent> entities)
         {
             if (!entities?.Any() ?? true)
             {
                 return;
             }
 
-            if (entities.Count == 1)
+            if (!entities.Skip(1).Any())
             {
                 await CreateAsync(entities.First());
                 return;

src/Core/Repositories/SqlServer/OrganizationUserRepository.cs

@@ -76,6 +76,20 @@ namespace Bit.Core.Repositories.SqlServer
             }
         }
 
+        public async Task<IEnumerable<string>> SelectKnownEmailsAsync(Guid organizationId, IEnumerable<string> emails,
+            bool onlyRegisteredUsers)
+        {
+            using (var connection = new SqlConnection(ConnectionString))
+            {
+                var result = await connection.QueryAsync<string>(
+                    "[dbo].[OrganizationUser_SelectKnownEmails]",
+                    new { OrganizationId = organizationId, Emails = emails.ToArrayTVP("Email"), OnlyUsers = onlyRegisteredUsers },
+                    commandType: CommandType.StoredProcedure);
+
+                return result;
+            }
+        }
+
         public async Task<OrganizationUser> GetByOrganizationAsync(Guid organizationId, Guid userId)
         {
             using (var connection = new SqlConnection(ConnectionString))
@@ -285,5 +299,71 @@ namespace Bit.Core.Repositories.SqlServer
                 return results.SingleOrDefault();
             }
         }
+
+        public async Task DeleteManyAsync(IEnumerable<Guid> organizationUserIds)
+        {
+            using (var connection = new SqlConnection(ConnectionString))
+            {
+                await connection.ExecuteAsync("[dbo].[OrganizationUser_DeleteByIds]",
+                    new { Ids = organizationUserIds.ToGuidIdArrayTVP() }, commandType: CommandType.StoredProcedure);
+            }
+        }
+
+        public async Task UpsertManyAsync(IEnumerable<OrganizationUser> organizationUsers)
+        {
+            var createUsers = new List<OrganizationUser>();
+            var replaceUsers = new List<OrganizationUser>();
+            foreach (var organizationUser in organizationUsers)
+            {
+                if (organizationUser.Id.Equals(default))
+                {
+                    createUsers.Add(organizationUser);
+                }
+                else
+                {
+                    replaceUsers.Add(organizationUser);
+                }
+            }
+
+            await CreateManyAsync(createUsers);
+            await ReplaceManyAsync(replaceUsers);
+        }
+
+        public async Task CreateManyAsync(IEnumerable<OrganizationUser> organizationUsers)
+        {
+            if (!organizationUsers.Any())
+            {
+                return;
+            }
+
+            foreach(var organizationUser in organizationUsers)
+            {
+                organizationUser.SetNewId();
+            }
+
+            using (var connection = new SqlConnection(ConnectionString))
+            {
+                var results = await connection.ExecuteAsync(
+                    $"[{Schema}].[{Table}_CreateMany]",
+                    new { OrganizationUsersInput = organizationUsers.ToTvp() },
+                    commandType: CommandType.StoredProcedure);
+            }
+        }
+
+        public async Task ReplaceManyAsync(IEnumerable<OrganizationUser> organizationUsers)
+        {
+            if (!organizationUsers.Any())
+            {
+                return;
+            }
+
+            using (var connection = new SqlConnection(ConnectionString))
+            {
+                var results = await connection.ExecuteAsync(
+                    $"[{Schema}].[{Table}_UpdateMany]",
+                    new { OrganizationUsersInput = organizationUsers.ToTvp() },
+                    commandType: CommandType.StoredProcedure);
+            }
+        }
     }
 }

src/Core/Repositories/TableStorage/EventRepository.cs

@@ -62,14 +62,14 @@ namespace Bit.Core.Repositories.TableStorage
             await CreateEntityAsync(entity);
         }
 
-        public async Task CreateManyAsync(IList<IEvent> e)
+        public async Task CreateManyAsync(IEnumerable<IEvent> e)
         {
             if (!e?.Any() ?? true)
             {
                 return;
             }
 
-            if (e.Count == 1)
+            if (!e.Skip(1).Any())
             {
                 await CreateAsync(e.First());
                 return;

src/Core/Services/IEventService.cs

@@ -15,6 +15,7 @@ namespace Bit.Core.Services
         Task LogGroupEventAsync(Group group, EventType type, DateTime? date = null);
         Task LogPolicyEventAsync(Policy policy, EventType type, DateTime? date = null);
         Task LogOrganizationUserEventAsync(OrganizationUser organizationUser, EventType type, DateTime? date = null);
+        Task LogOrganizationUserEventsAsync(IEnumerable<(OrganizationUser, EventType, DateTime?)> events);
         Task LogOrganizationEventAsync(Organization organization, EventType type, DateTime? date = null);
     }
 }

src/Core/Services/IEventWriteService.cs

@@ -7,6 +7,6 @@ namespace Bit.Core.Services
     public interface IEventWriteService
     {
         Task CreateAsync(IEvent e);
-        Task CreateManyAsync(IList<IEvent> e);
+        Task CreateManyAsync(IEnumerable<IEvent> e);
     }
 }

src/Core/Services/IMailEnqueuingService.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Bit.Core.Models.Mail;
+
+namespace Bit.Core.Services
+{
+    public interface IMailEnqueuingService
+    {
+        Task EnqueueAsync(IMailQueueMessage message, Func<IMailQueueMessage, Task> fallback);
+        Task EnqueueManyAsync(IEnumerable<IMailQueueMessage> messages, Func<IMailQueueMessage, Task> fallback);
+    }
+}

src/Core/Services/IMailService.cs

@@ -2,6 +2,7 @@
 using Bit.Core.Models.Table;
 using System.Collections.Generic;
 using System;
+using Bit.Core.Models.Mail;
 
 namespace Bit.Core.Services
 {
@@ -16,6 +17,7 @@ namespace Bit.Core.Services
         Task SendNoMasterPasswordHintEmailAsync(string email);
         Task SendMasterPasswordHintEmailAsync(string email, string hint);
         Task SendOrganizationInviteEmailAsync(string organizationName, OrganizationUser orgUser, string token);
+        Task BulkSendOrganizationInviteEmailAsync(string organizationName, IEnumerable<(OrganizationUser orgUser, string token)> invites);
         Task SendOrganizationAcceptedEmailAsync(string organizationName, string userEmail,
             IEnumerable<string> adminEmails);
         Task SendOrganizationConfirmedEmailAsync(string organizationName, string email);
@@ -37,5 +39,6 @@ namespace Bit.Core.Services
         Task SendEmergencyAccessRecoveryRejected(EmergencyAccess emergencyAccess, string rejectingName, string email);
         Task SendEmergencyAccessRecoveryReminder(EmergencyAccess emergencyAccess, string initiatingName, string email);
         Task SendEmergencyAccessRecoveryTimedOut(EmergencyAccess ea, string initiatingName, string email);
+        Task SendEnqueuedMailMessageAsync(IMailQueueMessage queueMessage);
     }
 }

src/Core/Services/IPaymentService.cs

@@ -9,10 +9,10 @@ namespace Bit.Core.Services
     {
         Task CancelAndRecoverChargesAsync(ISubscriber subscriber);
         Task<string> PurchaseOrganizationAsync(Organization org, PaymentMethodType paymentMethodType,
-            string paymentToken, Models.StaticStore.Plan plan, short additionalStorageGb, short additionalSeats,
+            string paymentToken, Models.StaticStore.Plan plan, short additionalStorageGb, int additionalSeats,
             bool premiumAccessAddon, TaxInfo taxInfo);
         Task<string> UpgradeFreeOrganizationAsync(Organization org, Models.StaticStore.Plan plan,
-           short additionalStorageGb, short additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo);
+           short additionalStorageGb, int additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo);
         Task<string> PurchasePremiumAsync(User user, PaymentMethodType paymentMethodType, string paymentToken,
             short additionalStorageGb, TaxInfo taxInfo);
         Task<string> AdjustStorageAsync(IStorableSubscriber storableSubscriber, int additionalStorage, string storagePlanId);

src/Core/Services/Implementations/AzureQueueEventWriteService.cs

@@ -4,34 +4,16 @@ using Azure.Storage.Queues;
 using Newtonsoft.Json;
 using Bit.Core.Models.Data;
 using Bit.Core.Settings;
+using System.Linq;
+using System.Text;
 
 namespace Bit.Core.Services
 {
-    public class AzureQueueEventWriteService : IEventWriteService
+    public class AzureQueueEventWriteService : AzureQueueService<IEvent>, IEventWriteService
     {
-        private readonly QueueClient _queueClient;
-
-        private JsonSerializerSettings _jsonSettings = new JsonSerializerSettings
-        {
-            NullValueHandling = NullValueHandling.Ignore
-        };
-
-        public AzureQueueEventWriteService(
-            GlobalSettings globalSettings)
-        {
-            _queueClient = new QueueClient(globalSettings.Events.ConnectionString, "event");
-        }
-
-        public async Task CreateAsync(IEvent e)
-        {
-            var json = JsonConvert.SerializeObject(e, _jsonSettings);
-            await _queueClient.SendMessageAsync(json);
-        }
-
-        public async Task CreateManyAsync(IList<IEvent> e)
-        {
-            var json = JsonConvert.SerializeObject(e, _jsonSettings);
-            await _queueClient.SendMessageAsync(json);
-        }
+        public AzureQueueEventWriteService(GlobalSettings globalSettings) : base(
+            new QueueClient(globalSettings.Events.ConnectionString, "event"),
+            new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore }) 
+        { }
     }
 }

src/Core/Services/Implementations/AzureQueueMailService.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Azure.Storage.Queues;
+using Bit.Core.Models.Mail;
+using Bit.Core.Settings;
+using Newtonsoft.Json;
+
+namespace Bit.Core.Services
+{
+    public class AzureQueueMailService : AzureQueueService<IMailQueueMessage>, IMailEnqueuingService
+    {
+        public AzureQueueMailService(GlobalSettings globalSettings) : base(
+            new QueueClient(globalSettings.Mail.ConnectionString, "mail"),
+            new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore })
+        { }
+
+        public Task EnqueueAsync(IMailQueueMessage message, Func<IMailQueueMessage, Task> fallback) =>
+            CreateAsync(message);
+
+        public Task EnqueueManyAsync(IEnumerable<IMailQueueMessage> messages, Func<IMailQueueMessage, Task> fallback) =>
+            CreateManyAsync(messages);
+    }
+}

src/Core/Services/Implementations/AzureQueueService.cs

@@ -0,0 +1,72 @@
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Threading.Tasks;
+using Azure.Storage.Queues;
+using IdentityServer4.Extensions;
+using Microsoft.EntityFrameworkCore.Internal;
+using Newtonsoft.Json;
+
+namespace Bit.Core.Services
+{
+    public abstract class AzureQueueService<T>
+    {
+        protected QueueClient _queueClient;
+        protected JsonSerializerSettings _jsonSettings;
+
+        protected AzureQueueService(QueueClient queueClient, JsonSerializerSettings jsonSettings)
+        {
+            _queueClient = queueClient;
+            _jsonSettings = jsonSettings;
+        }
+
+        public async Task CreateAsync(T message)
+        {
+            var json = JsonConvert.SerializeObject(message, _jsonSettings);
+            await _queueClient.SendMessageAsync(json);
+        }
+
+        public async Task CreateManyAsync(IEnumerable<T> messages)
+        {
+            if (messages?.Any() != true)
+            {
+                return;
+            }
+
+            if (!messages.Skip(1).Any())
+            {
+                await CreateAsync(messages.First());
+                return;
+            }
+
+            foreach (var json in SerializeMany(messages, _jsonSettings))
+            {
+                await _queueClient.SendMessageAsync(json);
+            }
+        }
+
+
+        protected IEnumerable<string> SerializeMany(IEnumerable<T> messages, JsonSerializerSettings jsonSettings)
+        {
+            var messagesLists = new List<List<T>> { new List<T>() };
+            var strings = new List<string>();
+            var ListMessageLength = 2; // to account for json array brackets "[]"
+            foreach (var (message, jsonEvent) in messages.Select(e => (e, JsonConvert.SerializeObject(e, jsonSettings))))
+            {
+
+                var messageLength = jsonEvent.Length + 1; // To account for json array comma
+                if (ListMessageLength + messageLength > _queueClient.MessageMaxBytes)
+                {
+                    messagesLists.Add(new List<T> { message });
+                    ListMessageLength = 2 + messageLength;
+                }
+                else
+                {
+                    messagesLists.Last().Add(message);
+                    ListMessageLength += messageLength;
+                }
+            }
+            return messagesLists.Select(l => JsonConvert.SerializeObject(l, jsonSettings));
+        }
+    }
+}

src/Core/Services/Implementations/BlockingMailQueueService.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Bit.Core.Models.Mail;
+
+namespace Bit.Core.Services
+{
+    public class BlockingMailEnqueuingService : IMailEnqueuingService
+    {
+        public async Task EnqueueAsync(IMailQueueMessage message, Func<IMailQueueMessage, Task> fallback)
+        {
+            await fallback(message);
+        }
+
+        public async Task EnqueueManyAsync(IEnumerable<IMailQueueMessage> messages, Func<IMailQueueMessage, Task> fallback)
+        {
+            foreach(var message in messages)
+            {
+                await fallback(message);
+            }
+        }
+    }
+}

src/Core/Services/Implementations/EventService.cs

@@ -178,24 +178,31 @@ namespace Bit.Core.Services
         }
 
         public async Task LogOrganizationUserEventAsync(OrganizationUser organizationUser, EventType type,
-            DateTime? date = null)
+            DateTime? date = null) =>
+            await LogOrganizationUserEventsAsync(new[] { (organizationUser, type, date) });
+
+        public async Task LogOrganizationUserEventsAsync(IEnumerable<(OrganizationUser, EventType, DateTime?)> events)
         {
             var orgAbilities = await _applicationCacheService.GetOrganizationAbilitiesAsync();
-            if (!CanUseEvents(orgAbilities, organizationUser.OrganizationId))
+            var eventMessages = new List<IEvent>();
+            foreach (var (organizationUser, type, date) in events)
             {
-                return;
+                if (!CanUseEvents(orgAbilities, organizationUser.OrganizationId))
+                {
+                    continue;
+                }
+                eventMessages.Add(new EventMessage
+                {
+                    OrganizationId = organizationUser.OrganizationId,
+                    UserId = organizationUser.UserId,
+                    OrganizationUserId = organizationUser.Id,
+                    Type = type,
+                    ActingUserId = _currentContext?.UserId,
+                    Date = date.GetValueOrDefault(DateTime.UtcNow)
+                });
             }
 
-            var e = new EventMessage(_currentContext)
-            {
-                OrganizationId = organizationUser.OrganizationId,
-                UserId = organizationUser.UserId,
-                OrganizationUserId = organizationUser.Id,
-                Type = type,
-                ActingUserId = _currentContext?.UserId,
-                Date = date.GetValueOrDefault(DateTime.UtcNow)
-            };
-            await _eventWriteService.CreateAsync(e);
+            await _eventWriteService.CreateManyAsync(eventMessages);
         }
 
         public async Task LogOrganizationEventAsync(Organization organization, EventType type, DateTime? date = null)

src/Core/Services/Implementations/HandlebarsMailService.cs

@@ -19,6 +19,7 @@ namespace Bit.Core.Services
 
         private readonly GlobalSettings _globalSettings;
         private readonly IMailDeliveryService _mailDeliveryService;
+        private readonly IMailEnqueuingService _mailEnqueuingService;
         private readonly Dictionary<string, Func<object, string>> _templateCache =
             new Dictionary<string, Func<object, string>>();
 
@@ -26,10 +27,12 @@ namespace Bit.Core.Services
 
         public HandlebarsMailService(
             GlobalSettings globalSettings,
-            IMailDeliveryService mailDeliveryService)
+            IMailDeliveryService mailDeliveryService,
+            IMailEnqueuingService mailEnqueuingService)
         {
             _globalSettings = globalSettings;
             _mailDeliveryService = mailDeliveryService;
+            _mailEnqueuingService = mailEnqueuingService;
         }
 
         public async Task SendVerifyEmailEmailAsync(string email, Guid userId, string token)
@@ -168,23 +171,32 @@ namespace Bit.Core.Services
             await _mailDeliveryService.SendEmailAsync(message);
         }
 
-        public async Task SendOrganizationInviteEmailAsync(string organizationName, OrganizationUser orgUser, string token)
+        public Task SendOrganizationInviteEmailAsync(string organizationName, OrganizationUser orgUser, string token) =>
+            BulkSendOrganizationInviteEmailAsync(organizationName, new[] { (orgUser, token) });
+
+        public async Task BulkSendOrganizationInviteEmailAsync(string organizationName, IEnumerable<(OrganizationUser orgUser, string token)> invites)
         {
-            var message = CreateDefaultMessage($"Join {organizationName}", orgUser.Email);
-            var model = new OrganizationUserInvitedViewModel
+            MailQueueMessage CreateMessage(string email, object model)
             {
-                OrganizationName = CoreHelpers.SanitizeForEmail(organizationName),
-                Email = WebUtility.UrlEncode(orgUser.Email),
-                OrganizationId = orgUser.OrganizationId.ToString(),
-                OrganizationUserId = orgUser.Id.ToString(),
-                Token = WebUtility.UrlEncode(token),
-                OrganizationNameUrlEncoded = WebUtility.UrlEncode(organizationName),
-                WebVaultUrl = _globalSettings.BaseServiceUri.VaultWithHash,
-                SiteName = _globalSettings.SiteName
-            };
-            await AddMessageContentAsync(message, "OrganizationUserInvited", model);
-            message.Category = "OrganizationUserInvited";
-            await _mailDeliveryService.SendEmailAsync(message);
+                var message = CreateDefaultMessage($"Join {organizationName}", email);
+                return new MailQueueMessage(message, "OrganizationUserInvited", model);
+            }
+
+            var messageModels = invites.Select(invite => CreateMessage(invite.orgUser.Email,
+                new OrganizationUserInvitedViewModel
+                {
+                    OrganizationName = CoreHelpers.SanitizeForEmail(organizationName),
+                    Email = WebUtility.UrlEncode(invite.orgUser.Email),
+                    OrganizationId = invite.orgUser.OrganizationId.ToString(),
+                    OrganizationUserId = invite.orgUser.Id.ToString(),
+                    Token = WebUtility.UrlEncode(invite.token),
+                    OrganizationNameUrlEncoded = WebUtility.UrlEncode(organizationName),
+                    WebVaultUrl = _globalSettings.BaseServiceUri.VaultWithHash,
+                    SiteName = _globalSettings.SiteName,
+                }
+            ));
+
+            await EnqueueMailAsync(messageModels);
         }
 
         public async Task SendOrganizationUserRemovedForPolicyTwoStepEmailAsync(string organizationName, string email)
@@ -341,6 +353,21 @@ namespace Bit.Core.Services
             await _mailDeliveryService.SendEmailAsync(message);
         }
 
+        public async Task SendEnqueuedMailMessageAsync(IMailQueueMessage queueMessage)
+        {
+            var message = CreateDefaultMessage(queueMessage.Subject, queueMessage.ToEmails);
+            message.BccEmails = queueMessage.BccEmails;
+            message.Category = queueMessage.Category;
+            await AddMessageContentAsync(message, queueMessage.TemplateName, queueMessage.Model);
+            await _mailDeliveryService.SendEmailAsync(message);
+        }
+
+        private Task EnqueueMailAsync(IMailQueueMessage queueMessage) =>
+            _mailEnqueuingService.EnqueueAsync(queueMessage, SendEnqueuedMailMessageAsync);
+
+        private Task EnqueueMailAsync(IEnumerable<IMailQueueMessage> queueMessages) =>
+            _mailEnqueuingService.EnqueueManyAsync(queueMessages, SendEnqueuedMailMessageAsync);
+
         private MailMessage CreateDefaultMessage(string subject, string toEmail)
         {
             return CreateDefaultMessage(subject, new List<string> { toEmail });

src/Core/Services/Implementations/OrganizationService.cs

@@ -443,9 +443,9 @@ namespace Bit.Core.Services
                 var taxRate = taxRates.FirstOrDefault();
                 if (taxRate != null && !sub.DefaultTaxRates.Any(x => x.Equals(taxRate.Id)))
                 {
-                    subUpdateOptions.DefaultTaxRates = new List<string>(1) 
-                    { 
-                        taxRate.Id 
+                    subUpdateOptions.DefaultTaxRates = new List<string>(1)
+                    {
+                        taxRate.Id
                     };
                 }
             }
@@ -1011,6 +1011,117 @@ namespace Bit.Core.Services
             await UpdateAsync(organization);
         }
 
+        private async Task<List<OrganizationUser>> InviteUsersAsync(Guid organizationId, Guid? invitingUserId,
+            IEnumerable<(OrganizationUserInvite invite, string externalId)> invites)
+        {
+            var organization = await GetOrgById(organizationId);
+            if (organization == null || invites.Any(i => i.invite.Emails == null || i.externalId == null))
+            {
+                throw new NotFoundException();
+            }
+
+            var inviteTypes = new HashSet<OrganizationUserType>(invites.Where(i => i.invite.Type.HasValue)
+                .Select(i => i.invite.Type.Value));
+            if (invitingUserId.HasValue && inviteTypes.Count > 0)
+            {
+                foreach (var type in inviteTypes)
+                {
+                    await ValidateOrganizationUserUpdatePermissionsAsync(invitingUserId.Value, organizationId, type, null);
+                }
+            }
+
+            if (organization.Seats.HasValue)
+            {
+                var userCount = await _organizationUserRepository.GetCountByOrganizationIdAsync(organizationId);
+                var availableSeats = organization.Seats.Value - userCount;
+                if (availableSeats < invites.Select(i => i.invite.Emails.Count()).Sum())
+                {
+                    throw new BadRequestException("You have reached the maximum number of users " +
+                        $"({organization.Seats.Value}) for this organization.");
+                }
+            }
+
+            var orgUsers = new List<OrganizationUser>();
+            var orgUserInvitedCount = 0;
+            var exceptions = new List<Exception>();
+            var events = new List<(OrganizationUser, EventType, DateTime?)>();
+            var existingEmails = new HashSet<string>(await _organizationUserRepository.SelectKnownEmailsAsync(
+                organizationId, invites.SelectMany(i => i.invite.Emails), false), StringComparer.InvariantCultureIgnoreCase);
+            foreach (var (invite, externalId) in invites)
+            {
+                foreach (var email in invite.Emails)
+                {
+                    try
+                    {
+                        // Make sure user is not already invited
+                        if (existingEmails.Contains(email))
+                        {
+                            continue;
+                        }
+
+                        var orgUser = new OrganizationUser
+                        {
+                            OrganizationId = organizationId,
+                            UserId = null,
+                            Email = email.ToLowerInvariant(),
+                            Key = null,
+                            Type = invite.Type.Value,
+                            Status = OrganizationUserStatusType.Invited,
+                            AccessAll = invite.AccessAll,
+                            ExternalId = externalId,
+                            CreationDate = DateTime.UtcNow,
+                            RevisionDate = DateTime.UtcNow,
+                        };
+
+                        if (invite.Permissions != null)
+                        {
+                            orgUser.Permissions = System.Text.Json.JsonSerializer.Serialize(invite.Permissions, new JsonSerializerOptions
+                            {
+                                PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+                            });
+                        }
+
+                        if (!orgUser.AccessAll && invite.Collections.Any())
+                        {
+                            throw new Exception("Bulk invite does not support limited collection invites");
+                        }
+
+                        events.Add((orgUser, EventType.OrganizationUser_Invited, DateTime.UtcNow));
+                        orgUsers.Add(orgUser);
+                        orgUserInvitedCount++;
+                    }
+                    catch (Exception e)
+                    {
+                        exceptions.Add(e);
+                    }
+                }
+            }
+
+            try
+            {
+                await _organizationUserRepository.CreateManyAsync(orgUsers);
+                await SendInvitesAsync(orgUsers, organization);
+                await _eventService.LogOrganizationUserEventsAsync(events);
+
+                await _referenceEventService.RaiseEventAsync(
+                    new ReferenceEvent(ReferenceEventType.InvitedUsers, organization)
+                    {
+                        Users = orgUserInvitedCount
+                    });
+            }
+            catch (Exception e)
+            {
+                exceptions.Add(e);
+            }
+
+            if (exceptions.Any())
+            {
+                throw new AggregateException("One or more errors occurred while inviting users.", exceptions);
+            }
+
+            return orgUsers;
+        }
+
         public async Task<List<OrganizationUser>> InviteUserAsync(Guid organizationId, Guid? invitingUserId,
             string externalId, OrganizationUserInvite invite)
         {
@@ -1022,7 +1133,7 @@ namespace Bit.Core.Services
 
             if (invitingUserId.HasValue && invite.Type.HasValue)
             {
-                await ValidateOrganizationUserUpdatePermissions(invitingUserId.Value, organizationId, invite.Type.Value, null);
+                await ValidateOrganizationUserUpdatePermissionsAsync(invitingUserId.Value, organizationId, invite.Type.Value, null);
             }
 
             if (organization.Seats.HasValue)
@@ -1125,6 +1236,14 @@ namespace Bit.Core.Services
             await SendInviteAsync(orgUser, org);
         }
 
+        private async Task SendInvitesAsync(IEnumerable<OrganizationUser> orgUsers, Organization organization)
+        {
+            string MakeToken(OrganizationUser orgUser) =>
+                _dataProtector.Protect($"OrganizationUserInvite {orgUser.Id} {orgUser.Email} {CoreHelpers.ToEpocMilliseconds(DateTime.UtcNow)}");
+            await _mailService.BulkSendOrganizationInviteEmailAsync(organization.Name,
+                orgUsers.Select(o => (o, MakeToken(o))));
+        }
+
         private async Task SendInviteAsync(OrganizationUser orgUser, Organization organization)
         {
             var nowMillis = CoreHelpers.ToEpocMilliseconds(DateTime.UtcNow);
@@ -1185,7 +1304,7 @@ namespace Bit.Core.Services
             return await AcceptUserAsync(orgUser, user, userService);
         }
 
-        private async Task<OrganizationUser> AcceptUserAsync(OrganizationUser orgUser, User user, 
+        private async Task<OrganizationUser> AcceptUserAsync(OrganizationUser orgUser, User user,
             IUserService userService)
         {
             if (orgUser.Status != OrganizationUserStatusType.Invited)
@@ -1322,13 +1441,14 @@ namespace Bit.Core.Services
             }
 
             var originalUser = await _organizationUserRepository.GetByIdAsync(user.Id);
-            if (user.Equals(originalUser)) {
+            if (user.Equals(originalUser))
+            {
                 throw new BadRequestException("Please make changes before saving.");
             }
 
             if (savingUserId.HasValue)
             {
-                await ValidateOrganizationUserUpdatePermissions(savingUserId.Value, user.OrganizationId, user.Type, originalUser.Type);
+                await ValidateOrganizationUserUpdatePermissionsAsync(savingUserId.Value, user.OrganizationId, user.Type, originalUser.Type);
             }
 
             if (user.Type != OrganizationUserType.Owner &&
@@ -1459,13 +1579,13 @@ namespace Bit.Core.Services
         {
             if (loggedInUserId.HasValue)
             {
-                await ValidateOrganizationUserUpdatePermissions(loggedInUserId.Value, organizationUser.OrganizationId, organizationUser.Type, null);
+                await ValidateOrganizationUserUpdatePermissionsAsync(loggedInUserId.Value, organizationUser.OrganizationId, organizationUser.Type, null);
             }
             await _organizationUserRepository.UpdateGroupsAsync(organizationUser.Id, groupIds);
             await _eventService.LogOrganizationUserEventAsync(organizationUser,
                 EventType.OrganizationUser_UpdatedGroups);
         }
-        
+
         public async Task UpdateUserResetPasswordEnrollmentAsync(Guid organizationId, Guid organizationUserId, string resetPasswordKey, Guid? callingUserId)
         {
             var orgUser = await _organizationUserRepository.GetByOrganizationAsync(organizationId, organizationUserId);
@@ -1480,7 +1600,7 @@ namespace Bit.Core.Services
 
             orgUser.ResetPasswordKey = resetPasswordKey;
             await _organizationUserRepository.ReplaceAsync(orgUser);
-            await _eventService.LogOrganizationUserEventAsync(orgUser, resetPasswordKey != null ? 
+            await _eventService.LogOrganizationUserEventAsync(orgUser, resetPasswordKey != null ?
                 EventType.OrganizationUser_ResetPassword_Enroll : EventType.OrganizationUser_ResetPassword_Withdraw);
         }
 
@@ -1558,32 +1678,23 @@ namespace Bit.Core.Services
                 var removeUsersSet = new HashSet<string>(removeUserExternalIds);
                 var existingUsersDict = existingExternalUsers.ToDictionary(u => u.ExternalId);
 
-                var usersToRemove = removeUsersSet
+                await _organizationUserRepository.DeleteManyAsync(removeUsersSet
                     .Except(newUsersSet)
-                    .Where(ru => existingUsersDict.ContainsKey(ru))
-                    .Select(ru => existingUsersDict[ru]);
-
-                foreach (var user in usersToRemove)
-                {
-                    if (user.Type != OrganizationUserType.Owner)
-                    {
-                        await _organizationUserRepository.DeleteAsync(new OrganizationUser { Id = user.Id });
-                        existingExternalUsersIdDict.Remove(user.ExternalId);
-                    }
-                }
+                    .Where(u => existingUsersDict.ContainsKey(u) && existingUsersDict[u].Type != OrganizationUserType.Owner)
+                    .Select(u => existingUsersDict[u].Id));
             }
 
             if (overwriteExisting)
             {
                 // Remove existing external users that are not in new user set
-                foreach (var user in existingExternalUsers)
+                var usersToDelete = existingExternalUsers.Where(u =>
+                    u.Type != OrganizationUserType.Owner &&
+                    !newUsersSet.Contains(u.ExternalId) &&
+                    existingExternalUsersIdDict.ContainsKey(u.ExternalId));
+                await _organizationUserRepository.DeleteManyAsync(usersToDelete.Select(u => u.Id));
+                foreach (var deletedUser in usersToDelete)
                 {
-                    if (user.Type != OrganizationUserType.Owner && !newUsersSet.Contains(user.ExternalId) &&
-                        existingExternalUsersIdDict.ContainsKey(user.ExternalId))
-                    {
-                        await _organizationUserRepository.DeleteAsync(new OrganizationUser { Id = user.Id });
-                        existingExternalUsersIdDict.Remove(user.ExternalId);
-                    }
+                    existingExternalUsersIdDict.Remove(deletedUser.ExternalId);
                 }
             }
 
@@ -1595,6 +1706,7 @@ namespace Bit.Core.Services
                     .ToDictionary(u => u.Email);
                 var newUsersEmailsDict = newUsers.ToDictionary(u => u.Email);
                 var usersToAttach = existingUsersEmailsDict.Keys.Intersect(newUsersEmailsDict.Keys).ToList();
+                var usersToUpsert = new List<OrganizationUser>();
                 foreach (var user in usersToAttach)
                 {
                     var orgUserDetails = existingUsersEmailsDict[user];
@@ -1602,10 +1714,11 @@ namespace Bit.Core.Services
                     if (orgUser != null)
                     {
                         orgUser.ExternalId = newUsersEmailsDict[user].ExternalId;
-                        await _organizationUserRepository.UpsertAsync(orgUser);
+                        usersToUpsert.Add(orgUser);
                         existingExternalUsersIdDict.Add(orgUser.ExternalId, orgUser.Id);
                     }
                 }
+                await _organizationUserRepository.UpsertManyAsync(usersToUpsert);
 
                 // Add new users
                 var existingUsersSet = new HashSet<string>(existingExternalUsersIdDict.Keys);
@@ -1620,11 +1733,12 @@ namespace Bit.Core.Services
                     enoughSeatsAvailable = seatsAvailable >= usersToAdd.Count;
                 }
 
-                if (!enoughSeatsAvailable) 
+                if (!enoughSeatsAvailable)
                 {
                     throw new BadRequestException($"Organization does not have enough seats available. Need {usersToAdd.Count} but {seatsAvailable} available.");
                 }
 
+                var userInvites = new List<(OrganizationUserInvite, string)>();
                 foreach (var user in newUsers)
                 {
                     if (!usersToAdd.Contains(user.ExternalId) || string.IsNullOrWhiteSpace(user.Email))
@@ -1641,9 +1755,7 @@ namespace Bit.Core.Services
                             AccessAll = false,
                             Collections = new List<SelectionReadOnly>(),
                         };
-                        var newUser = await InviteUserAsync(organizationId, importingUserId, user.Email, 
-                                OrganizationUserType.User, false, user.ExternalId, new List<SelectionReadOnly>());
-                        existingExternalUsersIdDict.Add(newUser.ExternalId, newUser.Id);
+                        userInvites.Add((invite, user.ExternalId));
                     }
                     catch (BadRequestException)
                     {
@@ -1651,10 +1763,16 @@ namespace Bit.Core.Services
                         continue;
                     }
                 }
+
+                var invitedUsers = await InviteUsersAsync(organizationId, importingUserId, userInvites);
+                foreach (var invitedUser in invitedUsers)
+                {
+                    existingExternalUsersIdDict.Add(invitedUser.ExternalId, invitedUser.Id);
+                }
             }
 
-            // Groups
 
+            // Groups
             if (groups?.Any() ?? false)
             {
                 if (!organization.UseGroups)
@@ -1822,7 +1940,8 @@ namespace Bit.Core.Services
             }
         }
 
-        private async Task ValidateOrganizationUserUpdatePermissions(Guid loggedInUserId, Guid organizationId, OrganizationUserType newType, OrganizationUserType? oldType) 
+        private async Task ValidateOrganizationUserUpdatePermissionsAsync(Guid loggedInUserId, Guid organizationId,
+            OrganizationUserType newType, OrganizationUserType? oldType)
         {
             var loggedInUserOrgs = await _organizationUserRepository.GetManyByUserAsync(loggedInUserId);
             var loggedInAsOrgOwner = loggedInUserOrgs

src/Core/Services/Implementations/RepositoryEventWriteService.cs

@@ -20,7 +20,7 @@ namespace Bit.Core.Services
             await _eventRepository.CreateAsync(e);
         }
 
-        public async Task CreateManyAsync(IList<IEvent> e)
+        public async Task CreateManyAsync(IEnumerable<IEvent> e)
         {
             await _eventRepository.CreateManyAsync(e);
         }

src/Core/Services/Implementations/StripePaymentService.cs

@@ -55,7 +55,7 @@ namespace Bit.Core.Services
 
         public async Task<string> PurchaseOrganizationAsync(Organization org, PaymentMethodType paymentMethodType,
             string paymentToken, Models.StaticStore.Plan plan, short additionalStorageGb,
-            short additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo)
+            int additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo)
         {
             var customerService = new CustomerService();
 
@@ -202,7 +202,7 @@ namespace Bit.Core.Services
         }
 
         public async Task<string> UpgradeFreeOrganizationAsync(Organization org, Models.StaticStore.Plan plan,
-            short additionalStorageGb, short additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo)
+            short additionalStorageGb, int additionalSeats, bool premiumAccessAddon, TaxInfo taxInfo)
         {
             if (!string.IsNullOrWhiteSpace(org.GatewaySubscriptionId))
             {

src/Core/Services/NoopImplementations/NoopEventService.cs

@@ -44,6 +44,11 @@ namespace Bit.Core.Services
             return Task.FromResult(0);
         }
 
+        public Task LogOrganizationUserEventsAsync(IEnumerable<(OrganizationUser, EventType, DateTime?)> events)
+        {
+            return Task.FromResult(0);
+        }
+
         public Task LogUserEventAsync(Guid userId, EventType type, DateTime? date = null)
         {
             return Task.FromResult(0);

src/Core/Services/NoopImplementations/NoopEventWriteService.cs

@@ -11,7 +11,7 @@ namespace Bit.Core.Services
             return Task.FromResult(0);
         }
 
-        public Task CreateManyAsync(IList<IEvent> e)
+        public Task CreateManyAsync(IEnumerable<IEvent> e)
         {
             return Task.FromResult(0);
         }

src/Core/Services/NoopImplementations/NoopMailService.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using Bit.Core.Models.Mail;
 using Bit.Core.Models.Table;
 
 namespace Bit.Core.Services
@@ -47,6 +48,11 @@ namespace Bit.Core.Services
             return Task.FromResult(0);
         }
 
+        public Task BulkSendOrganizationInviteEmailAsync(string organizationName, IEnumerable<(OrganizationUser orgUser, string token)> invites)
+        {
+            return Task.FromResult(0);
+        }
+
         public Task SendOrganizationUserRemovedForPolicyTwoStepEmailAsync(string organizationName, string email)
         {
             return Task.FromResult(0);
@@ -147,5 +153,10 @@ namespace Bit.Core.Services
         {
             return Task.FromResult(0);
         }
+
+        public Task SendEnqueuedMailMessageAsync(IMailQueueMessage queueMessage)
+        {
+            return Task.FromResult(0);
+        }
     }
 }

src/Core/Settings/GlobalSettings.cs

@@ -272,6 +272,19 @@ namespace Bit.Core.Settings
 
         public class MailSettings
         {
+            private ConnectionStringSettings _connectionStringSettings;
+            public string ConnectionString
+            {
+                get => _connectionStringSettings?.ConnectionString;
+                set
+                {
+                    if (_connectionStringSettings == null)
+                    {
+                        _connectionStringSettings = new ConnectionStringSettings();
+                    }
+                    _connectionStringSettings.ConnectionString = value;
+                }
+            }
             public string ReplyToEmail { get; set; }
             public string AmazonConfigSetName { get; set; }
             public SmtpSettings Smtp { get; set; } = new SmtpSettings();

src/Core/Utilities/CoreHelpers.cs

@@ -148,6 +148,55 @@ namespace Bit.Core.Utilities
             return table;
         }
 
+        public static DataTable ToTvp(this IEnumerable<OrganizationUser> orgUsers)
+        {
+            var table = new DataTable();
+            table.SetTypeName("[dbo].[OrganizationUserType]");
+
+            var columnData = new List<(string name, Type type, Func<OrganizationUser, object> getter)>
+            {
+                (nameof(OrganizationUser.Id), typeof(Guid), ou => ou.Id),
+                (nameof(OrganizationUser.OrganizationId), typeof(Guid), ou => ou.OrganizationId),
+                (nameof(OrganizationUser.UserId), typeof(Guid), ou => ou.UserId),
+                (nameof(OrganizationUser.Email), typeof(string), ou => ou.Email),
+                (nameof(OrganizationUser.Key), typeof(string), ou => ou.Key),
+                (nameof(OrganizationUser.Status), typeof(byte), ou => ou.Status),
+                (nameof(OrganizationUser.Type), typeof(byte), ou => ou.Type),
+                (nameof(OrganizationUser.AccessAll), typeof(bool), ou => ou.AccessAll),
+                (nameof(OrganizationUser.ExternalId), typeof(string), ou => ou.ExternalId),
+                (nameof(OrganizationUser.CreationDate), typeof(DateTime), ou => ou.CreationDate),
+                (nameof(OrganizationUser.RevisionDate), typeof(DateTime), ou => ou.RevisionDate),
+                (nameof(OrganizationUser.Permissions), typeof(string), ou => ou.Permissions),
+                (nameof(OrganizationUser.ResetPasswordKey), typeof(Guid), ou => ou.UserId),
+            };
+
+            foreach (var (name, type, getter) in columnData)
+            {
+                var column = new DataColumn(name, type);
+                table.Columns.Add(column);
+            }
+
+            foreach (var orgUser in orgUsers ?? new OrganizationUser[] { })
+            {
+                var row = table.NewRow();
+                foreach (var (name, type, getter) in columnData)
+                {
+                    var val = getter(orgUser);
+                    if (val == null)
+                    {
+                        row[name] = DBNull.Value;
+                    }
+                    else
+                    {
+                        row[name] = val;
+                    }
+                }
+                table.Rows.Add(row);
+            }
+
+            return table;
+        }
+
         public static string CleanCertificateThumbprint(string thumbprint)
         {
             // Clean possible garbage characters from thumbprint copy/paste

src/Core/Utilities/ServiceCollectionExtensions.cs

@@ -192,6 +192,15 @@ namespace Bit.Core.Utilities
                 services.AddSingleton<IBlockIpService, NoopBlockIpService>();
             }
 
+            if (!globalSettings.SelfHosted && CoreHelpers.SettingHasValue(globalSettings.Mail.ConnectionString))
+            {
+                services.AddSingleton<IMailEnqueuingService, AzureQueueMailService>();
+            }
+            else
+            {
+                services.AddSingleton<IMailEnqueuingService, BlockingMailEnqueuingService>();
+            }
+
             if (!globalSettings.SelfHosted && CoreHelpers.SettingHasValue(globalSettings.Events.ConnectionString))
             {
                 services.AddSingleton<IEventWriteService, AzureQueueEventWriteService>();

src/Sql/Sql.sqlproj

@@ -108,8 +108,10 @@
     <Build Include="dbo\Stored Procedures\Organization_ReadByUserId.sql" />
     <Build Include="dbo\Stored Procedures\Organization_Update.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_Create.sql" />
+    <Build Include="dbo\Stored Procedures\OrganizationUser_CreateMany.sql" />
     <Build Include="dbo\Stored Procedures\Grant_DeleteByKey.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_DeleteById.sql" />
+    <Build Include="dbo\Stored Procedures\OrganizationUser_DeleteByIds.sql" />
     <Build Include="dbo\Stored Procedures\Grant_Delete.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_ReadById.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_ReadByIds.sql" />
@@ -123,12 +125,16 @@
     <Build Include="dbo\Stored Procedures\User_ReadAccountRevisionDateById.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_ReadCountByOrganizationId.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_ReadCountByOnlyOwner.sql" />
+    <Build Include="dbo\Stored Procedures\OrganizationUser_SelectKnownEmails.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUser_Update.sql" />
+    <Build Include="dbo\Stored Procedures\OrganizationUser_UpdateMany.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUserOrganizationDetails_ReadByUserIdStatus.sql" />
     <Build Include="dbo\Stored Procedures\OrganizationUserUserDetails_ReadByOrganizationId.sql" />
     <Build Include="dbo\Stored Procedures\User_BumpAccountRevisionDate.sql" />
+    <Build Include="dbo\Stored Procedures\User_BumpManyAccountRevisionDates.sql" />
     <Build Include="dbo\Stored Procedures\User_BumpAccountRevisionDateByOrganizationId.sql" />
     <Build Include="dbo\Stored Procedures\User_BumpAccountRevisionDateByOrganizationUserId.sql" />
+    <Build Include="dbo\Stored Procedures\User_BumpAccountRevisionDateByOrganizationUserIds.sql" />
     <Build Include="dbo\Stored Procedures\Cipher_Delete.sql" />
     <Build Include="dbo\Stored Procedures\User_ReadPublicKeyById.sql" />
     <Build Include="dbo\Stored Procedures\Cipher_Move.sql" />
@@ -202,7 +208,10 @@
     <Build Include="dbo\Stored Procedures\Folder_ReadById.sql" />
     <Build Include="dbo\Stored Procedures\Folder_ReadByUserId.sql" />
     <Build Include="dbo\Stored Procedures\Organization_Create.sql" />
+    <Build Include="dbo\User Defined Types\EmailArray.sql" />
     <Build Include="dbo\User Defined Types\GuidIdArray.sql" />
+    <Build Include="dbo\User Defined Types\OrganizationUserType.sql" />
+    <Build Include="dbo\User Defined Types\TwoGuidIdArray.sql" />
     <Build Include="dbo\User Defined Types\SelectionReadOnlyArray.sql" />
     <Build Include="dbo\Stored Procedures\Cipher_UpdateAttachment.sql" />
     <Build Include="dbo\Stored Procedures\Organization_UpdateStorage.sql" />
@@ -272,6 +281,7 @@
     <Build Include="dbo\Stored Procedures\Cipher_SoftDelete.sql" />
     <Build Include="dbo\Tables\SsoUser.sql" />
     <Build Include="dbo\Stored Procedures\SsoUser_Delete.sql" />
+    <Build Include="dbo\Stored Procedures\SsoUser_DeleteMany.sql" />
     <Build Include="dbo\Stored Procedures\SsoUser_Create.sql" />
     <Build Include="dbo\Stored Procedures\User_ReadBySsoUserOrganizationIdExternalId.sql" />
     <Build Include="dbo\Stored Procedures\SsoUser_Update.sql" />

src/Sql/dbo/Stored Procedures/OrganizationUser_CreateMany.sql

@@ -0,0 +1,40 @@
+CREATE PROCEDURE [dbo].[OrganizationUser_CreateMany]
+    @OrganizationUsersInput [dbo].[OrganizationUserType] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    INSERT INTO [dbo].[OrganizationUser]
+        (
+        [Id],
+        [OrganizationId],
+        [UserId],
+        [Email],
+        [Key],
+        [Status],
+        [Type],
+        [AccessAll],
+        [ExternalId],
+        [CreationDate],
+        [RevisionDate],
+        [Permissions],
+        [ResetPasswordKey]
+        )
+    SELECT
+        OU.[Id],
+        OU.[OrganizationId],
+        OU.[UserId],
+        OU.[Email],
+        OU.[Key],
+        OU.[Status],
+        OU.[Type],
+        OU.[AccessAll],
+        OU.[ExternalId],
+        OU.[CreationDate],
+        OU.[RevisionDate],
+        OU.[Permissions],
+        OU.[ResetPasswordKey]
+    FROM
+        @OrganizationUsersInput OU
+END
+GO

src/Sql/dbo/Stored Procedures/OrganizationUser_DeleteByIds.sql

@@ -0,0 +1,83 @@
+CREATE PROCEDURE [dbo].[OrganizationUser_DeleteByIds]
+    @Ids [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    EXEC [dbo].[User_BumpAccountRevisionDateByOrganizationUserIds] @Ids
+
+    DECLARE @UserAndOrganizationIds [dbo].[TwoGuidIdArray]
+
+    INSERT INTO @UserAndOrganizationIds
+        (Id1, Id2)
+    SELECT
+        UserId,
+        OrganizationId
+    FROM
+        [dbo].[OrganizationUser] OU
+    INNER JOIN
+        @Ids OUIds ON OUIds.Id = OU.Id
+    WHERE
+        UserId IS NOT NULL AND
+        OrganizationId IS NOT NULL
+
+    BEGIN
+        EXEC [dbo].[SsoUser_DeleteMany] @UserAndOrganizationIds
+    END
+
+    DECLARE @BatchSize INT = 100
+
+    -- Delete CollectionUsers
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION CollectionUser_DeleteMany_CollectionUsers
+
+        DELETE TOP(@BatchSize) CU
+        FROM
+            [dbo].[CollectionUser] CU
+        INNER JOIN
+            @Ids I ON I.Id = CU.OrganizationUserId
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION CollectionUser_DeleteMany_CollectionUsers
+    END
+
+    SET @BatchSize = 100;
+
+    -- Delete GroupUsers
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION GroupUser_DeleteMany_GroupUsers
+
+        DELETE TOP(@BatchSize) GU
+        FROM
+            [dbo].[GroupUser] GU
+        INNER JOIN
+            @Ids I ON I.Id = GU.OrganizationUserId
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION GoupUser_DeleteMany_GroupUsers
+    END
+
+    
+    SET @BatchSize = 100;
+
+    -- Delete OrganizationUsers
+    WHILE @BatchSize > 0
+        BEGIN
+        BEGIN TRANSACTION OrganizationUser_DeleteMany_OrganizationUsers
+
+        DELETE TOP(@BatchSize) OU
+        FROM
+            [dbo].[OrganizationUser] OU
+        INNER JOIN
+            @Ids I ON I.Id = OU.Id
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION OrganizationUser_DeleteMany_OrganizationUsers
+    END
+END
+GO

src/Sql/dbo/Stored Procedures/OrganizationUser_SelectKnownEmails.sql

@@ -0,0 +1,30 @@
+CREATE PROCEDURE [dbo].[OrganizationUser_SelectKnownEmails]
+    @OrganizationId UNIQUEIDENTIFIER,
+    @Emails [dbo].[EmailArray] READONLY,
+    @OnlyUsers BIT
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        E.Email
+    FROM
+        @Emails E
+        INNER JOIN
+        (
+            SELECT
+            U.[Email] as 'UEmail',
+            OU.[Email] as 'OUEmail',
+            OU.OrganizationId
+        FROM
+            [dbo].[User] U
+            RIGHT JOIN
+            [dbo].[OrganizationUser] OU ON OU.[UserId] = U.[Id]
+        WHERE
+                OU.OrganizationId = @OrganizationId
+        ) OUU ON OUU.[UEmail] = E.[Email] OR OUU.[OUEmail] = E.[Email]
+    WHERE
+        (@OnlyUsers = 0 AND (OUU.UEmail IS NOT NULL OR OUU.OUEmail IS NOT NULL)) OR
+        (@OnlyUsers = 1 AND (OUU.UEmail IS NOT NULL))
+
+END

src/Sql/dbo/Stored Procedures/OrganizationUser_UpdateMany.sql

@@ -0,0 +1,33 @@
+CREATE PROCEDURE [dbo].[OrganizationUser_UpdateMany]
+    @OrganizationUsersInput [dbo].[OrganizationUserType] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        OU
+    SET
+        [OrganizationId] = OUI.[OrganizationId],
+        [UserId] = OUI.[UserId],
+        [Email] = OUI.[Email],
+        [Key] = OUI.[Key],
+        [Status] = OUI.[Status],
+        [Type] = OUI.[Type],
+        [AccessAll] = OUI.[AccessAll],
+        [ExternalId] = OUI.[ExternalId],
+        [CreationDate] = OUI.[CreationDate],
+        [RevisionDate] = OUI.[RevisionDate],
+        [Permissions] = OUI.[Permissions],
+        [ResetPasswordKey] = OUI.[ResetPasswordKey]
+    FROM
+        [dbo].[OrganizationUser] OU
+    INNER JOIN
+        @OrganizationUsersInput OUI ON OU.Id = OUI.Id
+
+    EXEC [dbo].[User_BumpManyAccountRevisionDates]
+    (
+        SELECT UserId
+        FROM @OrganizationUsersInput
+    )
+END
+GO

src/Sql/dbo/Stored Procedures/Organization_Create.sql

@@ -11,7 +11,7 @@
     @BillingEmail NVARCHAR(256),
     @Plan NVARCHAR(50),
     @PlanType TINYINT,
-    @Seats SMALLINT,
+    @Seats INT,
     @MaxCollections SMALLINT,
     @UsePolicies BIT,
     @UseSso BIT,

src/Sql/dbo/Stored Procedures/Organization_Update.sql

@@ -11,7 +11,7 @@
     @BillingEmail NVARCHAR(256),
     @Plan NVARCHAR(50),
     @PlanType TINYINT,
-    @Seats SMALLINT,
+    @Seats INT,
     @MaxCollections SMALLINT,
     @UsePolicies BIT,
     @UseSso BIT,

src/Sql/dbo/Stored Procedures/SsoUser_DeleteMany.sql

@@ -0,0 +1,34 @@
+CREATE PROCEDURE [dbo].[SsoUser_DeleteMany]
+    @UserAndOrganizationIds [dbo].[TwoGuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        Id
+    INTO
+        #SSOIds
+    FROM
+        [dbo].[SsoUser] SU
+    INNER JOIN
+        @UserAndOrganizationIds UOI ON UOI.Id1 = SU.UserId AND UOI.Id2 = SU.OrganizationId
+
+    DECLARE @BatchSize INT = 100
+
+    -- Delete SSO Users
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION SsoUser_DeleteMany_SsoUsers
+
+        DELETE TOP(@BatchSize) SU
+        FROM
+            [dbo].[SsoUser] SU
+        INNER JOIN
+            #SSOIds ON #SSOIds.Id = SU.Id
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION SsoUser_DeleteMany_SsoUsers
+    END
+END
+GO

src/Sql/dbo/Stored Procedures/User_BumpAccountRevisionDateByOrganizationUserIds.sql

@@ -0,0 +1,18 @@
+CREATE PROCEDURE [dbo].[User_BumpAccountRevisionDateByOrganizationUserIds]
+    @OrganizationUserIds [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        U
+    SET
+        U.[AccountRevisionDate] = GETUTCDATE()
+    FROM
+        @OrganizationUserIds OUIDs
+    INNER JOIN
+        [dbo].[OrganizationUser] OU ON OUIDs.Id = OU.Id AND OU.[Status] = 2 -- Confirmed
+    INNER JOIN
+        [dbo].[User] U ON OU.UserId = U.Id
+END
+GO

src/Sql/dbo/Stored Procedures/User_BumpManyAccountRevisionDates.sql

@@ -0,0 +1,16 @@
+CREATE PROCEDURE [dbo].[User_BumpManyAccountRevisionDates]
+    @Ids [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        U
+    SET
+        [AccountRevisionDate] = GETUTCDATE()
+    FROM
+        [dbo].[User] U
+    INNER JOIN
+        @Ids IDs ON IDs.Id = U.Id
+END
+GO

src/Sql/dbo/Tables/Organization.sql

@@ -11,7 +11,7 @@
     [BillingEmail]          NVARCHAR (256)   NOT NULL,
     [Plan]                  NVARCHAR (50)    NOT NULL,
     [PlanType]              TINYINT          NOT NULL,
-    [Seats]                 SMALLINT         NULL,
+    [Seats]                 INT              NULL,
     [MaxCollections]        SMALLINT         NULL,
     [UsePolicies]           BIT              NOT NULL,
     [UseSso]                BIT              NOT NULL,

src/Sql/dbo/User Defined Types/EmailArray.sql

@@ -0,0 +1,3 @@
+CREATE TYPE [dbo].[EmailArray] AS TABLE (
+    [Email] NVARCHAR(256) NOT NULL);
+GO

src/Sql/dbo/User Defined Types/OrganizationUserType.sql

@@ -0,0 +1,15 @@
+CREATE TYPE [dbo].[OrganizationUserType] AS TABLE(
+    [Id] UNIQUEIDENTIFIER,
+    [OrganizationId] UNIQUEIDENTIFIER,
+    [UserId] UNIQUEIDENTIFIER,
+    [Email] NVARCHAR(256),
+    [Key] VARCHAR(MAX),
+    [Status] TINYINT,
+    [Type] TINYINT,
+    [AccessAll] BIT,
+    [ExternalId] NVARCHAR(300),
+    [CreationDate] DATETIME2(7),
+    [RevisionDate] DATETIME2(7),
+    [Permissions] NVARCHAR(MAX),
+    [ResetPasswordKey] VARCHAR(MAX)
+)

src/Sql/dbo/User Defined Types/TwoGuidIdArray.sql

@@ -0,0 +1,4 @@
+CREATE TYPE [dbo].[TwoGuidIdArray] AS TABLE (
+    [Id1] UNIQUEIDENTIFIER NOT NULL,
+    [Id2] UNIQUEIDENTIFIER NOT NULL);
+GO

test/Core.Test/Services/HandlebarsMailServiceTests.cs

@@ -12,15 +12,18 @@ namespace Bit.Core.Test.Services
 
         private readonly GlobalSettings _globalSettings;
         private readonly IMailDeliveryService _mailDeliveryService;
+        private readonly IMailEnqueuingService _mailEnqueuingService;
 
         public HandlebarsMailServiceTests()
         {
             _globalSettings = new GlobalSettings();
             _mailDeliveryService = Substitute.For<IMailDeliveryService>();
+            _mailEnqueuingService = Substitute.For<IMailEnqueuingService>();
 
             _sut = new HandlebarsMailService(
                 _globalSettings,
-                _mailDeliveryService
+                _mailDeliveryService,
+                _mailEnqueuingService
             );
         }
 

test/Core.Test/Services/OrganizationServiceTests.cs

@@ -7,7 +7,6 @@ using Bit.Core.Models.Table;
 using Bit.Core.Models.Business;
 using Bit.Core.Repositories;
 using Bit.Core.Services;
-using Microsoft.AspNetCore.DataProtection;
 using NSubstitute;
 using Xunit;
 using Bit.Core.Test.AutoFixture;
@@ -17,135 +16,108 @@ using Bit.Core.Test.AutoFixture.Attributes;
 using Bit.Core.Test.AutoFixture.OrganizationFixtures;
 using System.Text.Json;
 using Organization = Bit.Core.Models.Table.Organization;
+using System.Linq;
 
 namespace Bit.Core.Test.Services
 {
     public class OrganizationServiceTests
     {
-        [Fact]
-        public async Task OrgImportCreateNewUsers()
+        // [Fact]
+        [Theory, PaidOrganizationAutoData]
+        public async Task OrgImportCreateNewUsers(SutProvider<OrganizationService> sutProvider, Guid userId,
+            Organization org, List<OrganizationUserUserDetails> existingUsers, List<ImportedOrganizationUser> newUsers)
         {
-            var orgRepo = Substitute.For<IOrganizationRepository>();
-            var orgUserRepo = Substitute.For<IOrganizationUserRepository>();
-            var collectionRepo = Substitute.For<ICollectionRepository>();
-            var userRepo = Substitute.For<IUserRepository>();
-            var groupRepo = Substitute.For<IGroupRepository>();
-            var dataProtector = Substitute.For<IDataProtector>();
-            var mailService = Substitute.For<IMailService>();
-            var pushNotService = Substitute.For<IPushNotificationService>();
-            var pushRegService = Substitute.For<IPushRegistrationService>();
-            var deviceRepo = Substitute.For<IDeviceRepository>();
-            var licenseService = Substitute.For<ILicensingService>();
-            var eventService = Substitute.For<IEventService>();
-            var installationRepo = Substitute.For<IInstallationRepository>();
-            var appCacheService = Substitute.For<IApplicationCacheService>();
-            var paymentService = Substitute.For<IPaymentService>();
-            var policyRepo = Substitute.For<IPolicyRepository>();
-            var ssoConfigRepo = Substitute.For<ISsoConfigRepository>();
-            var ssoUserRepo = Substitute.For<ISsoUserRepository>();
-            var referenceEventService = Substitute.For<IReferenceEventService>();
-            var globalSettings = Substitute.For<Settings.GlobalSettings>();
-            var taxRateRepository = Substitute.For<ITaxRateRepository>();
-
-            var orgService = new OrganizationService(orgRepo, orgUserRepo, collectionRepo, userRepo,
-                groupRepo, dataProtector, mailService, pushNotService, pushRegService, deviceRepo,
-                licenseService, eventService, installationRepo, appCacheService, paymentService, policyRepo,
-                ssoConfigRepo, ssoUserRepo, referenceEventService, globalSettings, taxRateRepository);
-
-            var id = Guid.NewGuid();
-            var userId = Guid.NewGuid();
-            var org = new Organization
+            org.UseDirectory = true;
+            newUsers.Add(new ImportedOrganizationUser
             {
-                Id = id,
-                Name = "Test Org",
-                UseDirectory = true,
-                UseGroups = true,
-                Seats = 3
-            };
-            orgRepo.GetByIdAsync(id).Returns(org);
-
-            var existingUsers = new List<OrganizationUserUserDetails>();
-            existingUsers.Add(new OrganizationUserUserDetails
-            {
-                Id = Guid.NewGuid(),
-                ExternalId = "a",
-                Email = "a@test.com"
+                Email = existingUsers.First().Email,
+                ExternalId = existingUsers.First().ExternalId
             });
-            orgUserRepo.GetManyDetailsByOrganizationAsync(id).Returns(existingUsers);
-            orgUserRepo.GetCountByOrganizationIdAsync(id).Returns(1);
+            var expectedNewUsersCount = newUsers.Count - 1;
 
-            var newUsers = new List<ImportedOrganizationUser>();
-            newUsers.Add(new ImportedOrganizationUser { Email = "a@test.com", ExternalId = "a" });
-            newUsers.Add(new ImportedOrganizationUser { Email = "b@test.com", ExternalId = "b" });
-            newUsers.Add(new ImportedOrganizationUser { Email = "c@test.com", ExternalId = "c" });
-            await orgService.ImportAsync(id, userId, null, newUsers, null, false);
+            sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(org.Id).Returns(org);
+            sutProvider.GetDependency<IOrganizationUserRepository>().GetManyDetailsByOrganizationAsync(org.Id)
+                .Returns(existingUsers);
+            sutProvider.GetDependency<IOrganizationUserRepository>().GetCountByOrganizationIdAsync(org.Id)
+                .Returns(existingUsers.Count);
 
-            await orgUserRepo.DidNotReceive().UpsertAsync(Arg.Any<OrganizationUser>());
-            await orgUserRepo.Received(2).CreateAsync(Arg.Any<OrganizationUser>());
+            await sutProvider.Sut.ImportAsync(org.Id, userId, null, newUsers, null, false);
+
+            await sutProvider.GetDependency<IOrganizationUserRepository>().DidNotReceiveWithAnyArgs()
+                .UpsertAsync(default);
+            await sutProvider.GetDependency<IOrganizationUserRepository>().Received(1)
+                .UpsertManyAsync(Arg.Is<IEnumerable<OrganizationUser>>(users => users.Count() == 0));
+            await sutProvider.GetDependency<IOrganizationUserRepository>().DidNotReceiveWithAnyArgs()
+                .CreateAsync(default);
+
+            // Create new users
+            await sutProvider.GetDependency<IOrganizationUserRepository>().Received(1)
+                .CreateManyAsync(Arg.Is<IEnumerable<OrganizationUser>>(users => users.Count() == expectedNewUsersCount));
+            await sutProvider.GetDependency<IMailService>().Received(1)
+                .BulkSendOrganizationInviteEmailAsync(org.Name,
+                Arg.Is<IEnumerable<(OrganizationUser, string)>>(messages => messages.Count() == expectedNewUsersCount));
+            
+            // Send events
+            await sutProvider.GetDependency<IEventService>().Received(1)
+                .LogOrganizationUserEventsAsync(Arg.Is<IEnumerable<(OrganizationUser, EventType, DateTime?)>>(events =>
+                events.Count() == expectedNewUsersCount));
+            await sutProvider.GetDependency<IReferenceEventService>().Received(1)
+                .RaiseEventAsync(Arg.Is<ReferenceEvent>(referenceEvent =>
+                referenceEvent.Type == ReferenceEventType.InvitedUsers && referenceEvent.Id == org.Id &&
+                referenceEvent.Users == expectedNewUsersCount));
         }
 
-        [Fact]
-        public async Task OrgImportCreateNewUsersAndMarryExistingUser()
+        [Theory, PaidOrganizationAutoData]
+        public async Task OrgImportCreateNewUsersAndMarryExistingUser(SutProvider<OrganizationService> sutProvider,
+            Guid userId, Organization org, List<OrganizationUserUserDetails> existingUsers,
+            List<ImportedOrganizationUser> newUsers)
         {
-            var orgRepo = Substitute.For<IOrganizationRepository>();
-            var orgUserRepo = Substitute.For<IOrganizationUserRepository>();
-            var collectionRepo = Substitute.For<ICollectionRepository>();
-            var userRepo = Substitute.For<IUserRepository>();
-            var groupRepo = Substitute.For<IGroupRepository>();
-            var dataProtector = Substitute.For<IDataProtector>();
-            var mailService = Substitute.For<IMailService>();
-            var pushNotService = Substitute.For<IPushNotificationService>();
-            var pushRegService = Substitute.For<IPushRegistrationService>();
-            var deviceRepo = Substitute.For<IDeviceRepository>();
-            var licenseService = Substitute.For<ILicensingService>();
-            var eventService = Substitute.For<IEventService>();
-            var installationRepo = Substitute.For<IInstallationRepository>();
-            var appCacheService = Substitute.For<IApplicationCacheService>();
-            var paymentService = Substitute.For<IPaymentService>();
-            var policyRepo = Substitute.For<IPolicyRepository>();
-            var ssoConfigRepo = Substitute.For<ISsoConfigRepository>();
-            var ssoUserRepo = Substitute.For<ISsoUserRepository>();
-            var referenceEventService = Substitute.For<IReferenceEventService>();
-            var globalSettings = Substitute.For<Settings.GlobalSettings>();
-            var taxRateRepo = Substitute.For<ITaxRateRepository>();
-
-            var orgService = new OrganizationService(orgRepo, orgUserRepo, collectionRepo, userRepo,
-                groupRepo, dataProtector, mailService, pushNotService, pushRegService, deviceRepo,
-                licenseService, eventService, installationRepo, appCacheService, paymentService, policyRepo,
-                ssoConfigRepo, ssoUserRepo, referenceEventService, globalSettings, taxRateRepo);
-
-            var id = Guid.NewGuid();
-            var userId = Guid.NewGuid();
-            var org = new Organization
+            org.UseDirectory = true;
+            var reInvitedUser = existingUsers.First();
+            reInvitedUser.ExternalId = null;
+            newUsers.Add(new ImportedOrganizationUser
             {
-                Id = id,
-                Name = "Test Org",
-                UseDirectory = true,
-                UseGroups = true,
-                Seats = 3
-            };
-            orgRepo.GetByIdAsync(id).Returns(org);
-
-            var existingUserAId = Guid.NewGuid();
-            var existingUsers = new List<OrganizationUserUserDetails>();
-            existingUsers.Add(new OrganizationUserUserDetails
-            {
-                Id = existingUserAId,
-                // No external id here
-                Email = "a@test.com"
+                Email = reInvitedUser.Email,
+                ExternalId = reInvitedUser.Email,
             });
-            orgUserRepo.GetManyDetailsByOrganizationAsync(id).Returns(existingUsers);
-            orgUserRepo.GetCountByOrganizationIdAsync(id).Returns(1);
-            orgUserRepo.GetByIdAsync(existingUserAId).Returns(new OrganizationUser { Id = existingUserAId });
+            var expectedNewUsersCount = newUsers.Count - 1;
 
-            var newUsers = new List<ImportedOrganizationUser>();
-            newUsers.Add(new ImportedOrganizationUser { Email = "a@test.com", ExternalId = "a" });
-            newUsers.Add(new ImportedOrganizationUser { Email = "b@test.com", ExternalId = "b" });
-            newUsers.Add(new ImportedOrganizationUser { Email = "c@test.com", ExternalId = "c" });
-            await orgService.ImportAsync(id, userId, null, newUsers, null, false);
+            sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(org.Id).Returns(org);
+            sutProvider.GetDependency<IOrganizationUserRepository>().GetManyDetailsByOrganizationAsync(org.Id)
+                .Returns(existingUsers);
+            sutProvider.GetDependency<IOrganizationUserRepository>().GetCountByOrganizationIdAsync(org.Id)
+                .Returns(existingUsers.Count);
+            sutProvider.GetDependency<IOrganizationUserRepository>().GetByIdAsync(reInvitedUser.Id)
+                .Returns(new OrganizationUser { Id = reInvitedUser.Id });
 
-            await orgUserRepo.Received(1).UpsertAsync(Arg.Any<OrganizationUser>());
-            await orgUserRepo.Received(2).CreateAsync(Arg.Any<OrganizationUser>());
+            await sutProvider.Sut.ImportAsync(org.Id, userId, null, newUsers, null, false);
+
+            await sutProvider.GetDependency<IOrganizationUserRepository>().DidNotReceiveWithAnyArgs()
+                .UpsertAsync(default);
+            await sutProvider.GetDependency<IOrganizationUserRepository>().DidNotReceiveWithAnyArgs()
+                .CreateAsync(default);
+            await sutProvider.GetDependency<IOrganizationUserRepository>().DidNotReceiveWithAnyArgs()
+                .CreateAsync(default, default);
+
+            // Upserted existing user
+            await sutProvider.GetDependency<IOrganizationUserRepository>().Received(1)
+                .UpsertManyAsync(Arg.Is<IEnumerable<OrganizationUser>>(users => users.Count() == 1));
+
+            // Created and invited new users
+            await sutProvider.GetDependency<IOrganizationUserRepository>().Received(1)
+                .CreateManyAsync(Arg.Is<IEnumerable<OrganizationUser>>(users => users.Count() == expectedNewUsersCount));
+            await sutProvider.GetDependency<IMailService>().Received(1)
+                .BulkSendOrganizationInviteEmailAsync(org.Name,
+                Arg.Is<IEnumerable<(OrganizationUser, string)>>(messages => messages.Count() == expectedNewUsersCount));
+
+            // Sent events
+            await sutProvider.GetDependency<IEventService>().Received(1)
+                .LogOrganizationUserEventsAsync(Arg.Is<IEnumerable<(OrganizationUser, EventType, DateTime?)>>(events =>
+                events.Where(e => e.Item2 == EventType.OrganizationUser_Invited).Count() == expectedNewUsersCount));
+            await sutProvider.GetDependency<IReferenceEventService>().Received(1)
+                .RaiseEventAsync(Arg.Is<ReferenceEvent>(referenceEvent => 
+                referenceEvent.Type == ReferenceEventType.InvitedUsers && referenceEvent.Id == org.Id && 
+                referenceEvent.Users == expectedNewUsersCount));
         }
 
         [Theory, CustomAutoData(typeof(SutProviderCustomization))]

util/Migrator/DbScripts/2021-04-07_00_IncreaseOrgSeatSize.sql

@@ -0,0 +1,235 @@
+IF EXISTS (
+    SELECT *
+    FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE COLUMN_NAME = 'Seats' AND 
+        DATA_TYPE = 'smallint' AND
+        TABLE_NAME = 'Organization')
+BEGIN
+    ALTER TABLE [dbo].[Organization]
+    ALTER COLUMN [Seats] INT NULL
+END
+GO
+
+IF OBJECT_ID('[dbo].[Organization_Create]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[Organization_Create]
+END
+GO
+
+CREATE PROCEDURE [dbo].[Organization_Create]
+    @Id UNIQUEIDENTIFIER,
+    @Identifier NVARCHAR(50),
+    @Name NVARCHAR(50),
+    @BusinessName NVARCHAR(50),
+    @BusinessAddress1 NVARCHAR(50),
+    @BusinessAddress2 NVARCHAR(50),
+    @BusinessAddress3 NVARCHAR(50),
+    @BusinessCountry VARCHAR(2),
+    @BusinessTaxNumber NVARCHAR(30),
+    @BillingEmail NVARCHAR(256),
+    @Plan NVARCHAR(50),
+    @PlanType TINYINT,
+    @Seats INT,
+    @MaxCollections SMALLINT,
+    @UsePolicies BIT,
+    @UseSso BIT,
+    @UseGroups BIT,
+    @UseDirectory BIT,
+    @UseEvents BIT,
+    @UseTotp BIT,
+    @Use2fa BIT,
+    @UseApi BIT,
+    @SelfHost BIT,
+    @UsersGetPremium BIT,
+    @Storage BIGINT,
+    @MaxStorageGb SMALLINT,
+    @Gateway TINYINT,
+    @GatewayCustomerId VARCHAR(50),
+    @GatewaySubscriptionId VARCHAR(50),
+    @ReferenceData VARCHAR(MAX),
+    @Enabled BIT,
+    @LicenseKey VARCHAR(100),
+    @ApiKey VARCHAR(30),
+    @TwoFactorProviders NVARCHAR(MAX),
+    @ExpirationDate DATETIME2(7),
+    @CreationDate DATETIME2(7),
+    @RevisionDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    INSERT INTO [dbo].[Organization]
+        (
+        [Id],
+        [Identifier],
+        [Name],
+        [BusinessName],
+        [BusinessAddress1],
+        [BusinessAddress2],
+        [BusinessAddress3],
+        [BusinessCountry],
+        [BusinessTaxNumber],
+        [BillingEmail],
+        [Plan],
+        [PlanType],
+        [Seats],
+        [MaxCollections],
+        [UsePolicies],
+        [UseSso],
+        [UseGroups],
+        [UseDirectory],
+        [UseEvents],
+        [UseTotp],
+        [Use2fa],
+        [UseApi],
+        [SelfHost],
+        [UsersGetPremium],
+        [Storage],
+        [MaxStorageGb],
+        [Gateway],
+        [GatewayCustomerId],
+        [GatewaySubscriptionId],
+        [ReferenceData],
+        [Enabled],
+        [LicenseKey],
+        [ApiKey],
+        [TwoFactorProviders],
+        [ExpirationDate],
+        [CreationDate],
+        [RevisionDate]
+        )
+    VALUES
+        (
+            @Id,
+            @Identifier,
+            @Name,
+            @BusinessName,
+            @BusinessAddress1,
+            @BusinessAddress2,
+            @BusinessAddress3,
+            @BusinessCountry,
+            @BusinessTaxNumber,
+            @BillingEmail,
+            @Plan,
+            @PlanType,
+            @Seats,
+            @MaxCollections,
+            @UsePolicies,
+            @UseSso,
+            @UseGroups,
+            @UseDirectory,
+            @UseEvents,
+            @UseTotp,
+            @Use2fa,
+            @UseApi,
+            @SelfHost,
+            @UsersGetPremium,
+            @Storage,
+            @MaxStorageGb,
+            @Gateway,
+            @GatewayCustomerId,
+            @GatewaySubscriptionId,
+            @ReferenceData,
+            @Enabled,
+            @LicenseKey,
+            @ApiKey,
+            @TwoFactorProviders,
+            @ExpirationDate,
+            @CreationDate,
+            @RevisionDate
+    )
+END
+GO
+
+-- Recreate procedure Organization_Update
+IF OBJECT_ID('[dbo].[Organization_Update]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[Organization_Update]
+END
+GO
+
+CREATE PROCEDURE [dbo].[Organization_Update]
+    @Id UNIQUEIDENTIFIER,
+    @Identifier NVARCHAR(50),
+    @Name NVARCHAR(50),
+    @BusinessName NVARCHAR(50),
+    @BusinessAddress1 NVARCHAR(50),
+    @BusinessAddress2 NVARCHAR(50),
+    @BusinessAddress3 NVARCHAR(50),
+    @BusinessCountry VARCHAR(2),
+    @BusinessTaxNumber NVARCHAR(30),
+    @BillingEmail NVARCHAR(256),
+    @Plan NVARCHAR(50),
+    @PlanType TINYINT,
+    @Seats INT,
+    @MaxCollections SMALLINT,
+    @UsePolicies BIT,
+    @UseSso BIT,
+    @UseGroups BIT,
+    @UseDirectory BIT,
+    @UseEvents BIT,
+    @UseTotp BIT,
+    @Use2fa BIT,
+    @UseApi BIT,
+    @SelfHost BIT,
+    @UsersGetPremium BIT,
+    @Storage BIGINT,
+    @MaxStorageGb SMALLINT,
+    @Gateway TINYINT,
+    @GatewayCustomerId VARCHAR(50),
+    @GatewaySubscriptionId VARCHAR(50),
+    @ReferenceData VARCHAR(MAX),
+    @Enabled BIT,
+    @LicenseKey VARCHAR(100),
+    @ApiKey VARCHAR(30),
+    @TwoFactorProviders NVARCHAR(MAX),
+    @ExpirationDate DATETIME2(7),
+    @CreationDate DATETIME2(7),
+    @RevisionDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        [dbo].[Organization]
+    SET
+        [Identifier] = @Identifier,
+        [Name] = @Name,
+        [BusinessName] = @BusinessName,
+        [BusinessAddress1] = @BusinessAddress1,
+        [BusinessAddress2] = @BusinessAddress2,
+        [BusinessAddress3] = @BusinessAddress3,
+        [BusinessCountry] = @BusinessCountry,
+        [BusinessTaxNumber] = @BusinessTaxNumber,
+        [BillingEmail] = @BillingEmail,
+        [Plan] = @Plan,
+        [PlanType] = @PlanType,
+        [Seats] = @Seats,
+        [MaxCollections] = @MaxCollections,
+        [UsePolicies] = @UsePolicies,
+        [UseSso] = @UseSso,
+        [UseGroups] = @UseGroups,
+        [UseDirectory] = @UseDirectory,
+        [UseEvents] = @UseEvents,
+        [UseTotp] = @UseTotp,
+        [Use2fa] = @Use2fa,
+        [UseApi] = @UseApi,
+        [SelfHost] = @SelfHost,
+        [UsersGetPremium] = @UsersGetPremium,
+        [Storage] = @Storage,
+        [MaxStorageGb] = @MaxStorageGb,
+        [Gateway] = @Gateway,
+        [GatewayCustomerId] = @GatewayCustomerId,
+        [GatewaySubscriptionId] = @GatewaySubscriptionId,
+        [ReferenceData] = @ReferenceData,
+        [Enabled] = @Enabled,
+        [LicenseKey] = @LicenseKey,
+        [ApiKey] = @ApiKey,
+        [TwoFactorProviders] = @TwoFactorProviders,
+        [ExpirationDate] = @ExpirationDate,
+        [CreationDate] = @CreationDate,
+        [RevisionDate] = @RevisionDate
+    WHERE
+        [Id] = @Id
+END
+GO

util/Migrator/DbScripts/2021-04-16_00_OrganizationUser_DeleteMany.sql

@@ -0,0 +1,183 @@
+-- Create sproc to bump the revision date of a batch of users
+IF OBJECT_ID('[dbo].[User_BumpAccountRevisionDateByOrganizationUserIds]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[User_BumpAccountRevisionDateByOrganizationUserIds]
+END
+GO
+
+CREATE PROCEDURE [dbo].[User_BumpAccountRevisionDateByOrganizationUserIds]
+    @OrganizationUserIds [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        OU.UserId
+    INTO
+        #UserIds
+    FROM
+        [dbo].[OrganizationUser] OU
+    INNER JOIN
+        @OrganizationUserIds OUIds ON OUIds.Id = OU.Id
+    WHERE
+        OU.[Status] = 2 -- Confirmed
+
+    UPDATE
+        U
+    SET
+        U.[AccountRevisionDate] = GETUTCDATE()
+    FROM
+        [dbo].[User] U
+    INNER JOIN
+        #UserIds ON U.[Id] = #UserIds.[UserId]
+END
+GO
+
+-- Create TwoGuidIdArray Type
+IF NOT EXISTS (
+    SELECT
+        *
+    FROM
+        sys.types
+    WHERE
+        [Name] = 'TwoGuidIdArray' AND
+        is_user_defined = 1
+)
+CREATE TYPE [dbo].[TwoGuidIdArray] AS TABLE (
+    [Id1] UNIQUEIDENTIFIER NOT NULL,
+    [Id2] UNIQUEIDENTIFIER NOT NULL);
+GO
+
+-- Create sproc to delete batch of users
+-- Parameter Ids are UserId, OrganizationId
+IF OBJECT_ID('[dbo].[SsoUser_DeleteMany]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[SsoUser_DeleteMany]
+END
+GO
+
+CREATE PROCEDURE [dbo].[SsoUser_DeleteMany]
+    @UserAndOrganizationIds [dbo].[TwoGuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        Id
+    INTO
+        #SSOIds
+    FROM
+        [dbo].[SsoUser] SU
+    INNER JOIN
+        @UserAndOrganizationIds UOI ON UOI.Id1 = SU.UserId AND UOI.Id2 = SU.OrganizationId
+
+    DECLARE @BatchSize INT = 100
+
+    -- Delete SSO Users
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION SsoUser_DeleteMany_SsoUsers
+
+        DELETE TOP(@BatchSize) SU
+        FROM
+            [dbo].[SsoUser] SU
+        INNER JOIN
+            #SSOIDs ON #SSOIds.Id = SU.Id
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION SsoUser_DeleteMany_SsoUsers
+    END
+END
+GO
+
+-- Create OrganizationUser Delete many by Id procedure
+IF OBJECT_ID('[dbo].[OrganizationUser_DeleteByIds]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[OrganizationUser_DeleteByIds]
+END
+GO
+
+CREATE PROCEDURE [dbo].[OrganizationUser_DeleteByIds]
+    @Ids [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    EXEC [dbo].[User_BumpAccountRevisionDateByOrganizationUserIds] @Ids
+
+    DECLARE @UserAndOrganizationIds [dbo].[TwoGuidIdArray]
+
+    INSERT INTO @UserAndOrganizationIds
+        (Id1, Id2)
+    SELECT
+        UserId,
+        OrganizationId
+    FROM
+        [dbo].[OrganizationUser] OU
+    INNER JOIN
+        @Ids OUIds ON OUIds.Id = OU.Id
+    WHERE
+        UserId IS NOT NULL AND
+        OrganizationId IS NOT NULL
+
+    BEGIN
+        EXEC [dbo].[SsoUser_DeleteMany] @UserAndOrganizationIds
+    END
+
+    DECLARE @BatchSize INT = 100
+
+    -- Delete CollectionUsers
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION CollectionUser_DeleteMany_CUs
+
+        DELETE TOP(@BatchSize) CU
+        FROM
+            [dbo].[CollectionUser] CU
+        INNER JOIN
+            @Ids I ON I.Id = CU.OrganizationUserId
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION CollectionUser_DeleteMany_CUs
+    END
+
+    SET @BatchSize = 100;
+
+    -- Delete GroupUsers
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION GroupUser_DeleteMany_GroupUsers
+
+        DELETE TOP(@BatchSize) GU
+        FROM
+            [dbo].[GroupUser] GU
+        INNER JOIN
+            @Ids I ON I.Id = GU.OrganizationUserId
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION GoupUser_DeleteMany_GroupUsers
+    END
+
+
+    SET @BatchSize = 100;
+
+    -- Delete OrganizationUsers
+    WHILE @BatchSize > 0
+    BEGIN
+        BEGIN TRANSACTION OrganizationUser_DeleteMany_OUs
+
+        DELETE TOP(@BatchSize) OU
+        FROM
+            [dbo].[OrganizationUser] OU
+        INNER JOIN
+            @Ids I ON I.Id = OU.Id
+
+        SET @BatchSize = @@ROWCOUNT
+
+        COMMIT TRANSACTION OrganizationUser_DeleteMany_OUs
+    END
+END
+GO

util/Migrator/DbScripts/2021-04-27_00_OrganizationUser_UpsertMany.sql

@@ -0,0 +1,142 @@
+-- Create OrganizationUser Type
+IF NOT EXISTS (
+    SELECT
+        *
+    FROM
+        sys.types
+    WHERE 
+        [Name] = 'OrganizationUserType' AND
+        is_user_defined = 1
+)
+BEGIN
+CREATE TYPE [dbo].[OrganizationUserType] AS TABLE(
+    [Id] UNIQUEIDENTIFIER,
+    [OrganizationId] UNIQUEIDENTIFIER,
+    [UserId] UNIQUEIDENTIFIER,
+    [Email] NVARCHAR(256),
+    [Key] VARCHAR(MAX),
+    [Status] TINYINT,
+    [Type] TINYINT,
+    [AccessAll] BIT,
+    [ExternalId] NVARCHAR(300),
+    [CreationDate] DATETIME2(7),
+    [RevisionDate] DATETIME2(7),
+    [Permissions] NVARCHAR(MAX),
+    [ResetPasswordKey] VARCHAR(MAX)
+)
+END
+GO
+
+-- Create many sproc
+IF OBJECT_ID('[dbo].[OrganizationUser_CreateMany]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[OrganizationUser_CreateMany]
+END
+GO
+
+CREATE PROCEDURE [dbo].[OrganizationUser_CreateMany]
+    @OrganizationUsersInput [dbo].[OrganizationUserType] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    INSERT INTO [dbo].[OrganizationUser]
+        (
+        [Id],
+        [OrganizationId],
+        [UserId],
+        [Email],
+        [Key],
+        [Status],
+        [Type],
+        [AccessAll],
+        [ExternalId],
+        [CreationDate],
+        [RevisionDate],
+        [Permissions],
+        [ResetPasswordKey]
+        )
+    SELECT
+        OU.[Id],
+        OU.[OrganizationId],
+        OU.[UserId],
+        OU.[Email],
+        OU.[Key],
+        OU.[Status],
+        OU.[Type],
+        OU.[AccessAll],
+        OU.[ExternalId],
+        OU.[CreationDate],
+        OU.[RevisionDate],
+        OU.[Permissions],
+        OU.[ResetPasswordKey]
+    FROM
+        @OrganizationUsersInput OU
+END
+GO
+
+-- Bump many user account revision dates
+IF OBJECT_ID('[dbo].[User_BumpManyAccountRevisionDates]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[User_BumpManyAccountRevisionDates]
+END
+GO
+
+CREATE PROCEDURE [dbo].[User_BumpManyAccountRevisionDates]
+    @Ids [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        U
+    SET
+        [AccountRevisionDate] = GETUTCDATE()
+    FROM
+        [dbo].[User] U
+    INNER JOIN
+        @Ids IDs ON IDs.Id = U.Id
+END
+GO
+
+-- Update many OrganizationUsers
+IF OBJECT_ID('[dbo].[OrganizationUser_UpdateMany]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[OrganizationUser_UpdateMany]
+END
+GO
+
+CREATE PROCEDURE [dbo].[OrganizationUser_UpdateMany]
+    @OrganizationUsersInput [dbo].[OrganizationUserType] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        OU
+    SET
+        [OrganizationId] = OUI.[OrganizationId],
+        [UserId] = OUI.[UserId],
+        [Email] = OUI.[Email],
+        [Key] = OUI.[Key],
+        [Status] = OUI.[Status],
+        [Type] = OUI.[Type],
+        [AccessAll] = OUI.[AccessAll],
+        [ExternalId] = OUI.[ExternalId],
+        [CreationDate] = OUI.[CreationDate],
+        [RevisionDate] = OUI.[RevisionDate],
+        [Permissions] = OUI.[Permissions],
+        [ResetPasswordKey] = OUI.[ResetPasswordKey]
+    FROM
+        [dbo].[OrganizationUser] OU
+    INNER JOIN
+        @OrganizationUsersInput OUI ON OU.Id = OUI.Id
+
+
+    EXEC [dbo].[User_BumpManyAccountRevisionDates]
+    (
+        SELECT UserId
+        FROM @OrganizationUsersInput
+    )
+END
+GO

util/Migrator/DbScripts/2021-04-30_00_Select_Known_OrganizationUsers_Emails.sql

@@ -0,0 +1,49 @@
+-- Create EmailArray type
+IF NOT EXISTS (
+    SELECT *
+FROM sys.types
+WHERE [Name] = 'EmailArray'
+    AND is_user_defined = 1
+)
+CREATE TYPE [dbo].[EmailArray] AS TABLE (
+    [Email] NVARCHAR(256) NOT NULL);
+GO
+
+IF OBJECT_ID('[dbo].[OrganizationUser_SelectKnownEmails]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[OrganizationUser_SelectKnownEmails]
+END
+GO
+
+-- Create sproc to return existing users
+CREATE PROCEDURE [dbo].[OrganizationUser_SelectKnownEmails]
+    @OrganizationId UNIQUEIDENTIFIER,
+    @Emails [dbo].[EmailArray] READONLY,
+    @OnlyUsers BIT
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        E.Email
+    FROM
+        @Emails E
+        INNER JOIN
+        (
+            SELECT
+            U.[Email] as 'UEmail',
+            OU.[Email] as 'OUEmail',
+            OU.OrganizationId
+        FROM
+            [dbo].[User] U
+            RIGHT JOIN
+            [dbo].[OrganizationUser] OU ON OU.[UserId] = U.[Id]
+        WHERE
+                OU.OrganizationId = @OrganizationId
+        ) OUU ON OUU.[UEmail] = E.[Email] OR OUU.[OUEmail] = E.[Email]
+    WHERE
+        (@OnlyUsers = 0 AND (OUU.UEmail IS NOT NULL OR OUU.OUEmail IS NOT NULL)) OR
+        (@OnlyUsers = 1 AND (OUU.UEmail IS NOT NULL))
+
+END
+GO