User impact: Users may not have been able to load the search bar in SharePoint Online sites.

Final status: We’ve confirmed that the recent change that we rolled back contained a regression that resulted in this impact. After completing this rollback, we were able to confirm that this action resolved the through service health telemetry and confirmation from a subset of affected users.

Scope of impact: This event impacted any user attempting to use the search bar in SharePoint Online.

Start time: Thursday, April 30, 2026, at 7:30 AM UTC

End time: Thursday, April 30, 2026, at 6:45 PM UTC

Root cause: A recent service update contained a regression that resulted in this impact.

Next steps: 
– We’re reviewing the responsible change to better understand what led to the error that resulted in impact and prevent similar future occurrences by improving our service update testing and validation phases.

This is the final update for the event.