I'm resposting from this thread to hopefully create more attention for this problem: https://answers.microsoft.com/en-us/outlook_com/forum/outlk_win-outtop_new-outsub_ofb/outlook-error-message-somehting-went-wrong-48v35/97d7ff71-8a58-40c8-8726-adf3d1f095b8 Me and other admins (from reposted thread) have specific users who experience M365 authentication problems after upgrading to the latest FSLogix version(s) that offers support for New Teams. The error occurs in the Azure Virtual Desktop environment, when a user tries to open a Microsoft application (Outlook, OneDrive etc.).

Not all users have the problem that they need to reauthenticate, or can't authenticate at all, with the 48v35 error. The users who do however, repeatedly get the same error after a few days or a week. We tried multiple things, like removing the Microsoft.AADBrokerPlugin directory or creating a completely new FSLogix profile, but the problem stays for these users. In my case I am using the FSLogix setting RoamIdentity=1. Is there any news from FSLogix on this issue? Or does anyone have workarounds to share? I would like to update more customer environments to use the New Teams, but with these issues I would rather wait.