Added conditional subject and button text to invite email.

src/Api/AdminConsole/Authorization/AuthorizationHandlerCollectionExtensions.cs

@@ -13,9 +13,9 @@ public static void AddAdminConsoleAuthorizationHandlers(this IServiceCollection
 
         services.TryAddEnumerable([
                 ServiceDescriptor.Scoped<IAuthorizationHandler, BulkCollectionAuthorizationHandler>(),
-                ServiceDescriptor.Scoped<IAuthorizationHandler, CollectionAuthorizationHandler>(),
-                ServiceDescriptor.Scoped<IAuthorizationHandler, GroupAuthorizationHandler>(),
-                ServiceDescriptor.Scoped<IAuthorizationHandler, OrganizationRequirementHandler>(),
-            ]);
+            ServiceDescriptor.Scoped<IAuthorizationHandler, CollectionAuthorizationHandler>(),
+            ServiceDescriptor.Scoped<IAuthorizationHandler, GroupAuthorizationHandler>(),
+            ServiceDescriptor.Scoped<IAuthorizationHandler, OrganizationRequirementHandler>(),
+        ]);
     }
 }

src/Core/AdminConsole/OrganizationFeatures/OrganizationUsers/InviteUsers/SendOrganizationInvitesCommand.cs

@@ -22,7 +22,8 @@ public class SendOrganizationInvitesCommand(
     IPolicyRepository policyRepository,
     IOrgUserInviteTokenableFactory orgUserInviteTokenableFactory,
     IDataProtectorTokenFactory<OrgUserInviteTokenable> dataProtectorTokenFactory,
-    IMailService mailService) : ISendOrganizationInvitesCommand
+    IMailService mailService,
+    IFeatureService featureService) : ISendOrganizationInvitesCommand
 {
     public async Task SendInvitesAsync(SendInvitesRequest request)
     {
@@ -71,12 +72,15 @@ private async Task<OrganizationInvitesInfo> BuildOrganizationInvitesInfoAsync(IE
 
         var orgUsersWithExpTokens = orgUsers.Select(MakeOrgUserExpiringTokenPair);
 
+        var isSubjectFeatureEnabled = featureService.IsEnabled(FeatureFlagKeys.InviteEmailImprovements);
+
         return new OrganizationInvitesInfo(
             organization,
             orgSsoEnabled,
             orgSsoLoginRequiredPolicyEnabled,
             orgUsersWithExpTokens,
             orgUserHasExistingUserDict,
+            isSubjectFeatureEnabled,
             initOrganization
         );
     }

src/Core/Constants.cs

@@ -134,6 +134,7 @@ public static class FeatureFlagKeys
     public const string CipherRepositoryBulkResourceCreation = "pm-24951-cipher-repository-bulk-resource-creation-service";
     public const string CollectionVaultRefactor = "pm-25030-resolve-ts-upgrade-errors";
     public const string DeleteClaimedUserAccountRefactor = "pm-25094-refactor-delete-managed-organization-user-command";
+    public const string InviteEmailImprovements = "pm-25644-update-join-organization-subject-line";
 
     /* Auth Team */
     public const string TwoFactorExtensionDataPersistence = "pm-9115-two-factor-extension-data-persistence";

src/Core/MailTemplates/Handlebars/OrganizationUserInvited.html.hbs

@@ -3,7 +3,7 @@
     <tr>
         <td display="display: table-cell">
             <a href="{{{Url}}}" clicktracking=off target="_blank" style="color: #ffffff; text-decoration: none; text-align: center; cursor: pointer; border-radius: 5px; background-color: #175DDC; border-color: #175DDC; border-style: solid; border-width: 10px 20px; margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 16px; line-height: 25px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none;">
-                Join Organization Now
+               {{JoinOrganizationButtonText}}
             </a>
         </td>
     </tr>

src/Core/Models/Mail/OrganizationInvitesInfo.cs

@@ -15,6 +15,7 @@ public OrganizationInvitesInfo(
         bool orgSsoLoginRequiredPolicyEnabled,
         IEnumerable<(OrganizationUser orgUser, ExpiringToken token)> orgUserTokenPairs,
         Dictionary<Guid, bool> orgUserHasExistingUserDict,
+        bool isSubjectFeatureEnabled = false,
         bool initOrganization = false
         )
     {
@@ -29,6 +30,8 @@ public OrganizationInvitesInfo(
 
         OrgUserTokenPairs = orgUserTokenPairs;
         OrgUserHasExistingUserDict = orgUserHasExistingUserDict;
+
+        IsSubjectFeatureEnabled = isSubjectFeatureEnabled;
     }
 
     public string OrganizationName { get; }
@@ -38,6 +41,8 @@ public OrganizationInvitesInfo(
     public string OrgSsoIdentifier { get; }
     public bool OrgSsoLoginRequiredPolicyEnabled { get; }
 
+    public bool IsSubjectFeatureEnabled { get; }
+
     public IEnumerable<(OrganizationUser OrgUser, ExpiringToken Token)> OrgUserTokenPairs { get; }
     public Dictionary<Guid, bool> OrgUserHasExistingUserDict { get; }
 

src/Core/Models/Mail/OrganizationUserInvitedViewModel.cs

@@ -22,6 +22,7 @@ public static OrganizationUserInvitedViewModel CreateFromInviteInfo(
         GlobalSettings globalSettings)
     {
         var freeOrgTitle = "A Bitwarden member invited you to an organization. Join now to start securing your passwords!";
+
         return new OrganizationUserInvitedViewModel
         {
             TitleFirst = orgInvitesInfo.IsFreeOrg ? freeOrgTitle : "Join ",
@@ -48,6 +49,45 @@ public static OrganizationUserInvitedViewModel CreateFromInviteInfo(
         };
     }
 
+    public static OrganizationUserInvitedViewModel CreateFromInviteInfo_v2(
+        OrganizationInvitesInfo orgInvitesInfo,
+        OrganizationUser orgUser,
+        ExpiringToken expiringToken,
+        GlobalSettings globalSettings)
+    {
+        const string freeOrgTitle = "A Bitwarden member invited you to an organization. " +
+                                    "Join now to start securing your passwords!";
+
+        var userHasExistingUser = orgInvitesInfo.OrgUserHasExistingUserDict[orgUser.Id];
+
+        return new OrganizationUserInvitedViewModel
+        {
+            TitleFirst = orgInvitesInfo.IsFreeOrg ? freeOrgTitle : "Join ",
+            TitleSecondBold =
+                orgInvitesInfo.IsFreeOrg
+                    ? string.Empty
+                    : CoreHelpers.SanitizeForEmail(orgInvitesInfo.OrganizationName, false),
+            TitleThird = orgInvitesInfo.IsFreeOrg ? string.Empty : " on Bitwarden and start securing your passwords!",
+            OrganizationName = CoreHelpers.SanitizeForEmail(orgInvitesInfo.OrganizationName, false),
+            Email = WebUtility.UrlEncode(orgUser.Email),
+            OrganizationId = orgUser.OrganizationId.ToString(),
+            OrganizationUserId = orgUser.Id.ToString(),
+            Token = WebUtility.UrlEncode(expiringToken.Token),
+            ExpirationDate =
+                $"{expiringToken.ExpirationDate.ToLongDateString()} {expiringToken.ExpirationDate.ToShortTimeString()} UTC",
+            OrganizationNameUrlEncoded = WebUtility.UrlEncode(orgInvitesInfo.OrganizationName),
+            WebVaultUrl = globalSettings.BaseServiceUri.VaultWithHash,
+            SiteName = globalSettings.SiteName,
+            InitOrganization = orgInvitesInfo.InitOrganization,
+            OrgSsoIdentifier = orgInvitesInfo.OrgSsoIdentifier,
+            OrgSsoEnabled = orgInvitesInfo.OrgSsoEnabled,
+            OrgSsoLoginRequiredPolicyEnabled = orgInvitesInfo.OrgSsoLoginRequiredPolicyEnabled,
+            OrgUserHasExistingUser = userHasExistingUser,
+            JoinOrganizationButtonText = userHasExistingUser || orgInvitesInfo.IsFreeOrg ? "Accept invitation" : "Finish account setup",
+            IsFreeOrg = orgInvitesInfo.IsFreeOrg
+        };
+    }
+
     public string OrganizationName { get; set; }
     public string OrganizationId { get; set; }
     public string OrganizationUserId { get; set; }
@@ -60,6 +100,8 @@ public static OrganizationUserInvitedViewModel CreateFromInviteInfo(
     public bool OrgSsoEnabled { get; set; }
     public bool OrgSsoLoginRequiredPolicyEnabled { get; set; }
     public bool OrgUserHasExistingUser { get; set; }
+    public string JoinOrganizationButtonText { get; set; } = "Join Organization";
+    public bool IsFreeOrg { get; set; }
 
     public string Url
     {

src/Core/Services/Implementations/HandlebarsMailService.cs

@@ -351,21 +351,43 @@ public async Task SendOrganizationConfirmedEmailAsync(string organizationName, s
 
     public async Task SendOrganizationInviteEmailsAsync(OrganizationInvitesInfo orgInvitesInfo)
     {
-        MailQueueMessage CreateMessage(string email, object model)
-        {
-            var message = CreateDefaultMessage($"Join {orgInvitesInfo.OrganizationName}", email);
-            return new MailQueueMessage(message, "OrganizationUserInvited", model);
-        }
-
         var messageModels = orgInvitesInfo.OrgUserTokenPairs.Select(orgUserTokenPair =>
         {
             Debug.Assert(orgUserTokenPair.OrgUser.Email is not null);
-            var orgUserInviteViewModel = OrganizationUserInvitedViewModel.CreateFromInviteInfo(
-                orgInvitesInfo, orgUserTokenPair.OrgUser, orgUserTokenPair.Token, _globalSettings);
+
+            var orgUserInviteViewModel = orgInvitesInfo.IsSubjectFeatureEnabled
+                ? OrganizationUserInvitedViewModel.CreateFromInviteInfo_v2(
+                    orgInvitesInfo, orgUserTokenPair.OrgUser, orgUserTokenPair.Token, _globalSettings)
+                : OrganizationUserInvitedViewModel.CreateFromInviteInfo(orgInvitesInfo, orgUserTokenPair.OrgUser,
+                    orgUserTokenPair.Token, _globalSettings);
+
             return CreateMessage(orgUserTokenPair.OrgUser.Email, orgUserInviteViewModel);
         });
 
         await EnqueueMailAsync(messageModels);
+        return;
+
+        MailQueueMessage CreateMessage(string email, OrganizationUserInvitedViewModel model)
+        {
+            var subject = $"Join {model.OrganizationName}";
+
+            if (orgInvitesInfo.IsSubjectFeatureEnabled)
+            {
+                ArgumentNullException.ThrowIfNull(model);
+
+                subject = model! switch
+                {
+                    { IsFreeOrg: true, OrgUserHasExistingUser: true } => "You have been invited to a Bitwarden Organization",
+                    { IsFreeOrg: true, OrgUserHasExistingUser: false } => "You have been invited to Bitwarden Password Manager",
+                    { IsFreeOrg: false, OrgUserHasExistingUser: true } => $"{model.OrganizationName} invited you to their Bitwarden organization",
+                    { IsFreeOrg: false, OrgUserHasExistingUser: false } => $"{model.OrganizationName} set up a Bitwarden account for you"
+                };
+            }
+
+            var message = CreateDefaultMessage(subject, email);
+
+            return new MailQueueMessage(message, "OrganizationUserInvited", model);
+        }
     }
 
     public async Task SendOrganizationUserRevokedForTwoFactorPolicyEmailAsync(string organizationName, string email)