Some users are stuck in an authentication loop when attempting to access SharePoint Online pages

Title: Some users are stuck in an authentication loop when attempting to access SharePoint Online pages

User impact: Users were stuck in an authentication loop when attempting to access SharePoint Online pages.

Final status: We’ve confirmed that an update to a portion of the authentication process introduced a misconfiguration, causing impact. We’ve reverted the update to restore the correct configurations and, after a period of monitoring and validating with affected users, we’ve observed that our actions have remediated impact.

Scope of impact: Your organization was affected by this event, and some users attempting to access SharePoint Online pages were impacted.

Start time: Thursday, March 14, 2024, at 5:16 PM UTC

End time: Tuesday, March 26, 2024, at 5:35 PM UTC

Root cause: A recent service change manifested an authentication configuration issue associated with impact.

Next steps:
– We’re reviewing our authentication configuration service change process to ensure impact can be avoided in the future.

This is the final update for the event.