M365 Service Health Notification

Microsoft Teams service alert Incident information Title: Some users may have been intermittently unable to join calls or meetings through Microsoft Teams. ID: TM218102 Status Service Restored Details Title: Some users may have been intermittently unable to join calls or meetings through Microsoft Teams. User Impact: Users may have been intermittently unable to join calls or meetings through Microsoft Teams. More info: A small number of users attempting to create Teams live events may have also been impacted, though subsequent attempts would have been successful. Final status: We've determined that a recently implemented throttling limit that was put in place to prevent bursts in unexpected meeting joins, inadvertently throttled expected traffic that occurred around 2:00 PM UTC. We've removed the throttling rule and confirmed that the service is healthy after monitoring the environment. Scope of impact: Impact was specific to a subset of users from the North America region. The most significant impact occurred around 2:00 PM UTC. Start time: Wednesday, July 8, 2020, at 1:45 PM UTC End time: Wednesday, July 8, 2020, at 2:30 PM UTC Root cause: A recently introduced throttling threshold had been reached, resulting in impact to additional requests. Next steps: - We're reviewing our throttling procedures to find ways to prevent this problem from happening again. - We're reviewing our monitoring services to look for ways to reduce detection time and more quickly restore service. This is the final update for the event. Thank you, The Microsoft team To customize what's included in this email, who gets it, or to unsubscribe, set your Service health preferences. If you are receiving this email because your Admin added you as a recipient, please contact your Admin to unsubscribe. Microsoft respects your privacy. Review our online Privacy Statement. Microsoft Corporation One Microsoft Way Redmond, WA USA 98052