Users may be unable to play migrated Stream videos in Microsoft Stream

Title: Users may be unable to play migrated Stream videos in Microsoft Stream

User impact: Users may have been unable to play migrated Stream videos in Microsoft Stream.

More info: Users attempting to play impacted Stream videos encountered the error message: “This browser or app can’t play the video. Something might be outdated or not supported. Try again using a different browser or app.”

Final status: The repair process has completed, and we’ve confirmed that the overwhelming majority of customers are no longer impacted and that the previously affected files are available and functioning as expected. However, we’ve identified a limited subset of customers with lingering impact from this issue and we’re publishing a separate communication to track the remediation effort going forward for those organizations.
Scope of impact: Any user may have been unable to play migrated Stream videos in Microsoft Stream.

Start time: Saturday, February 10, 2024, at 2:00 AM UTC

End time: Monday, April 15, 2024, at 11:00 AM UTC

Root cause: A recent feature update, intended to enhance the reliability and stability of our service, contained a code regression that impacted Stream video files that were migrated between Saturday, February 10, 2024, at 2:00 AM UTC, and Tuesday, February 20, 2024, at 9:30 AM UTC, causing them to be unable to play.

Next steps:
– We’re reviewing our feature update procedures to ensure issues of this nature do not occur again.
– We’re preparing additional communication for the limited subset of customers who are still affected by this issue.

For a more comprehensive list of next steps and actions, please refer to the Post Incident Review document.

A post-incident report will be published within five business days.