https://github.com/umbraco/Umbraco-CMS/issues/11263

Fixes issue where we used the current users email when sending invite emails. Now we use the one from SMTP settings like in v8

src/Umbraco.Web.BackOffice/Controllers/UsersController.cs

@@ -557,7 +557,7 @@ namespace Umbraco.Cms.Web.BackOffice.Controllers
             // i.e. "Some Person" <hello@example.com>
             var toMailBoxAddress = new MailboxAddress(to.Name, to.Email);
 
-            var mailMessage = new EmailMessage(fromEmail, toMailBoxAddress.ToString(), emailSubject, emailBody, true);
+            var mailMessage = new EmailMessage(null /*use info from smtp settings*/, toMailBoxAddress.ToString(), emailSubject, emailBody, true);
 
             await _emailSender.SendAsync(mailMessage, Constants.Web.EmailTypes.UserInvite, true);
         }