diff --git a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/App_Start/Startup.Auth.cs b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/App_Start/Startup.Auth.cs
index e7cece7..7eb5d35 100644
--- a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/App_Start/Startup.Auth.cs
+++ b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/App_Start/Startup.Auth.cs
@@ -59,7 +59,7 @@ public void ConfigureAuth(IAppBuilder app, Autofac.IContainer container)
                         if (upn == null
                             || !validUpns.Contains(upn, StringComparer.OrdinalIgnoreCase))
                         {
-                            context.OwinContext.Response.Redirect("/Account/InvalidUser");
+                            context.OwinContext.Response.Redirect("/Account/InvalidUser?upn=" + upn);
                             context.HandleResponse();
                         }
 
diff --git a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Controllers/AccountController.cs b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Controllers/AccountController.cs
index 96f4728..04f797d 100644
--- a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Controllers/AccountController.cs
+++ b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Controllers/AccountController.cs
@@ -56,9 +56,11 @@ public ActionResult SignOutCallback()
         /// <summary>
         /// Invalid User
         /// </summary>
+        /// <param name="upn">upn of unauthorized user</param>
         /// <returns>Action Result</returns>
-        public ActionResult InvalidUser()
+        public ActionResult InvalidUser(string upn)
         {
+            this.ViewBag.Upn = upn;
             this.HttpContext.GetOwinContext().Authentication.SignOut(CookieAuthenticationDefaults.AuthenticationType);
             return this.View();
         }
diff --git a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Views/Account/InvalidUser.cshtml b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Views/Account/InvalidUser.cshtml
index 6139e74..931cd79 100644
--- a/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Views/Account/InvalidUser.cshtml
+++ b/Source/Microsoft.Teams.Apps.FAQPlusPlus.Configuration/Views/Account/InvalidUser.cshtml
@@ -2,4 +2,4 @@
     ViewBag.Title = "Invalid User";
 }
 <h2>@ViewBag.Title.</h2>
-<p class="text-danger">This user does not have the proper permissions for this action. Please sign in with a valid user credentials.</p>
\ No newline at end of file
+<p class="text-danger">This user does not have the proper permissions for this action. Please sign in with a valid user credentials. In case you are still unable to access the app please ask the app administrator to add @ViewBag.Upn to the list of users allowed to configure this app</p>
\ No newline at end of file