diff --git a/backend/extensions/Squidex.Extensions/Actions/Comment/CommentActionHandler.cs b/backend/extensions/Squidex.Extensions/Actions/Comment/CommentActionHandler.cs
index 844aca37b..96972bce5 100644
--- a/backend/extensions/Squidex.Extensions/Actions/Comment/CommentActionHandler.cs
+++ b/backend/extensions/Squidex.Extensions/Actions/Comment/CommentActionHandler.cs
@@ -47,7 +47,7 @@ namespace Squidex.Extensions.Actions.Comment
                 {
                     AppId = contentEvent.AppId,
                     Actor = actor,
-                    CommentsId = contentEvent.Id,
+                    CommentsId = contentEvent.Id.ToString(),
                     Text = text
                 };
 
@@ -59,7 +59,7 @@ namespace Squidex.Extensions.Actions.Comment
 
         protected override async Task<Result> ExecuteJobAsync(CommentJob job, CancellationToken ct = default)
         {
-            if (job.CommentsId == Guid.Empty)
+            if (string.IsNullOrWhiteSpace(job.CommentsId))
             {
                 return Result.Ignored();
             }
@@ -78,7 +78,7 @@ namespace Squidex.Extensions.Actions.Comment
 
         public RefToken Actor { get; set; }
 
-        public Guid CommentsId { get; set; }
+        public string CommentsId { get; set; }
 
         public string Text { get; set; }
     }
diff --git a/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationAction.cs b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationAction.cs
new file mode 100644
index 000000000..e54e8d851
--- /dev/null
+++ b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationAction.cs
@@ -0,0 +1,43 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using System.ComponentModel.DataAnnotations;
+using Squidex.Domain.Apps.Core.HandleRules;
+using Squidex.Domain.Apps.Core.Rules;
+
+namespace Squidex.Extensions.Actions.Notification
+{
+    [RuleAction(
+        Title = "Notification",
+        IconImage = "<svg version='1.1' xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'><path d='M20.016 15.984v-12h-16.031v14.016l2.016-2.016h14.016zM20.016 2.016c1.078 0 1.969 0.891 1.969 1.969v12c0 1.078-0.891 2.016-1.969 2.016h-14.016l-3.984 3.984v-18c0-1.078 0.891-1.969 1.969-1.969h16.031z'></path></svg>",
+        IconColor = "#3389ff",
+        Display = "Send a notification",
+        Description = "Send an integrated notification to a user.")]
+    public sealed class NotificationAction : RuleAction
+    {
+        [Required]
+        [Display(Name = "User", Description = "The user id or email.")]
+        [DataType(DataType.Text)]
+        public string User { get; set; }
+
+        [Required]
+        [Display(Name = "Title", Description = "The text to send.")]
+        [DataType(DataType.MultilineText)]
+        [Formattable]
+        public string Text { get; set; }
+
+        [Display(Name = "Url", Description = "The optional url to attach to the notification.")]
+        [DataType(DataType.Text)]
+        [Formattable]
+        public string Url { get; set; }
+
+        [Display(Name = "Client", Description = "An optional client name.")]
+        [DataType(DataType.Text)]
+        public string Client { get; set; }
+    }
+}
diff --git a/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationActionHandler.cs b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationActionHandler.cs
new file mode 100644
index 000000000..dda2475d7
--- /dev/null
+++ b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationActionHandler.cs
@@ -0,0 +1,102 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Squidex.Domain.Apps.Core.HandleRules;
+using Squidex.Domain.Apps.Core.HandleRules.EnrichedEvents;
+using Squidex.Domain.Apps.Entities.Comments.Commands;
+using Squidex.Infrastructure;
+using Squidex.Infrastructure.Commands;
+using Squidex.Infrastructure.Reflection;
+using Squidex.Shared.Users;
+
+namespace Squidex.Extensions.Actions.Notification
+{
+    public sealed class NotificationActionHandler : RuleActionHandler<NotificationAction, NotificationJob>
+    {
+        private const string Description = "Send a Notification";
+        private static readonly NamedId<Guid> NoApp = NamedId.Of(Guid.Empty, "none");
+        private readonly ICommandBus commandBus;
+        private readonly IUserResolver userResolver;
+
+        public NotificationActionHandler(RuleEventFormatter formatter, ICommandBus commandBus, IUserResolver userResolver)
+            : base(formatter)
+        {
+            Guard.NotNull(commandBus);
+            Guard.NotNull(userResolver);
+
+            this.commandBus = commandBus;
+
+            this.userResolver = userResolver;
+        }
+
+        protected override async Task<(string Description, NotificationJob Data)> CreateJobAsync(EnrichedEvent @event, NotificationAction action)
+        {
+            if (@event is EnrichedUserEventBase userEvent)
+            {
+                var text = Format(action.Text, @event);
+
+                var actor = userEvent.Actor;
+
+                if (!string.IsNullOrEmpty(action.Client))
+                {
+                    actor = new RefToken(RefTokenType.Client, action.Client);
+                }
+
+                var user = await userResolver.FindByIdOrEmailAsync(action.User);
+
+                if (user == null)
+                {
+                    throw new InvalidOperationException($"Cannot find user by '{action.User}'");
+                }
+
+                var ruleJob = new NotificationJob { Actor = actor, CommentsId = user.Id, Text = text };
+
+                if (!string.IsNullOrWhiteSpace(action.Url))
+                {
+                    var url = Format(action.Url, @event);
+
+                    if (Uri.TryCreate(url, UriKind.RelativeOrAbsolute, out var uri))
+                    {
+                        ruleJob.Url = uri;
+                    }
+                }
+
+                return (Description, ruleJob);
+            }
+
+            return ("Ignore", new NotificationJob());
+        }
+
+        protected override async Task<Result> ExecuteJobAsync(NotificationJob job, CancellationToken ct = default)
+        {
+            if (string.IsNullOrWhiteSpace(job.CommentsId))
+            {
+                return Result.Ignored();
+            }
+
+            var command = SimpleMapper.Map(job, new CreateComment { AppId = NoApp });
+
+            await commandBus.PublishAsync(command);
+
+            return Result.Success($"Notified: {job.Text}");
+        }
+    }
+
+    public sealed class NotificationJob
+    {
+        public RefToken Actor { get; set; }
+
+        public string CommentsId { get; set; }
+
+        public string Text { get; set; }
+
+        public Uri Url { get; set; }
+    }
+}
diff --git a/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationPlugin.cs b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationPlugin.cs
new file mode 100644
index 000000000..d0b000911
--- /dev/null
+++ b/backend/extensions/Squidex.Extensions/Actions/Notification/NotificationPlugin.cs
@@ -0,0 +1,22 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Squidex.Infrastructure.Plugins;
+
+namespace Squidex.Extensions.Actions.Notification
+{
+    public sealed class NotificationPlugin : IPlugin
+    {
+        public void ConfigureServices(IServiceCollection services, IConfiguration config)
+        {
+            services.AddRuleAction<NotificationAction, NotificationActionHandler>();
+        }
+    }
+}
diff --git a/frontend/app/features/settings/pages/more/more-page.component.html b/frontend/app/features/settings/pages/more/more-page.component.html
index 111542628..ae419a695 100644
--- a/frontend/app/features/settings/pages/more/more-page.component.html
+++ b/frontend/app/features/settings/pages/more/more-page.component.html
@@ -14,7 +14,7 @@
                     <div class="form-group">
                         <label for="email">Name</label>
         
-                        <input type="text" class="form-control" readonly [value]="app.name" />
+                        <input type="text" class="form-control" readonly [value]="app?.name" />
                     </div>
 
                     <div class="form-group">
@@ -55,9 +55,9 @@
 
                             <ng-template #notUploading>
                                 <div>
-                                    <sqx-avatar [image]="app.image" [identifier]="app.name" [size]="150"></sqx-avatar>
+                                    <sqx-avatar [image]="app?.image" [identifier]="app?.name" [size]="150"></sqx-avatar>
 
-                                    <ng-container *ngIf="isImageEditable && app.image">
+                                    <ng-container *ngIf="isImageEditable && app?.image">
                                         <button class="btn btn-danger btn-sm app-image-remove" title="Remove image" (click)="removeImage()">
                                             <i class="icon-bin2"></i>
                                         </button>