Microsoft 365 Alert – Service Degradation – SharePoint Online – Some users may be unable to access SharePoint Online through the app launcher – RESOLVED

Announcements Arpan Das

02/05/2025 08:45:00 AM

NHSmail Reference: INC46519933

Microsoft Reference: SP1066091

Issue Status: RESOLVED

Issue Description: Users may be unable to access SharePoint Online through the app launcher.

More info: Users have reported that they can bypass the issue by accessing SharePoint Online sites via direct link.

Final Update: 05/05/2025 09:30:00 AM – Microsoft have confirmed with a subset of affected users that the issue has been resolved following their reversion of the offending change.

Scope of impact: Some users may be unable to access SharePoint Online through the app launcher.

Root cause: A recent routine update to a portion of the Microsoft 365 navigation service introduced an issue that causes inconsistent user provisioning detection, resulting in affected users being incorrectly redirected to a fallback page.

Next Steps: Microsoft are reviewing their routine update procedures so they can better identify similar issues during their testing and development cycles and avoid comparable impact in the future.