Microsoft 4usqa Outlook Error

8 May 2025 saw an Outlook Desktop App error which mainly affected businesses with a domain based Microsoft 365 email service running in the Outlook Desktop app, also known as Classic Outlook. This page is our take on the issue together with our recommendations

Something went wrong. [4usqa] GW 9/5/25

This error renders the desktop version of Outlook unusable
The Microsoft Outlook App on mobile phones and tablets still works fine
Browsing to outlook.office.com to send and receive emails also still works fine
The problem had only been apparent for 24 hours or so and there was no official advice from Microsoft available
Alex found the solution on Reddit, one the best IT forums we see
https://bit.ly/RedditOutlookFix

The solution

Admin console, Identity menu option > Applications > Enterprise applications
Search for Microsoft Information Protection API > Properties > Enable for users to sign in Yes

Report abuse