Users may be unable to enforce required site themes on SharePoint Online home pages

Title: Users may be unable to enforce required site themes on SharePoint Online home pages

User impact: Users may have been unable to enforce required site themes on SharePoint Online home pages.

More info: As a workaround, affected users may have been able to refresh their home page to get the required site theme.

Final status: We’ve confirmed with affected users that our action to re-enable the setting that halted the use of the problem code set succeeded in resolving this issue.
Scope of impact: Impact was specific to users who are served through the affected infrastructure, attempting to enforce required site themes in SharePoint Online site home pages.

Start time: Monday, March 25, 2024, at 9:41 PM UTC

End time: Wednesday, March 27, 2024, at 5:25 PM UTC

Root cause: A recent cleanup operation deactivated a setting intended to bypass a specific set of code, which caused an API error to occur in the impacted workflow and resulted in the impact.

Next steps:
– We’re reviewing our cleanup operation procedures to prevent issues like this from occurring in the future.

This is the final update for the event.