Some users may be unable to load their calendar in the Microsoft Teams web app

Title: Some users may be unable to load their calendar in the Microsoft Teams web app User impact: Users may have been unable to load their calendar in the Microsoft Teams web app. More info: Affected users may have experienced longer loading times when accessing their calendars. Retrying may have allowed the calendar to load successfully. Final status: While we were in the process of analyzing our service-side telemetry to review the recurrence of the previously identified issue, our system monitoring indicated that the service had returned to normal health. We've confirmed that the issue is no longer occurring, and we'll continue to monitor the service to ensure that the problem doesn't happen again. Scope of impact: Impact was specific to some users attempting to load their calendar in the Microsoft Teams web app. Start time: Saturday, October 10, 2026, at 12:00 AM UTC End time: Thursday, October 29, 2026, at 6:07 PM UTC Root cause: A recent configuration change to the way licensing is checked within the environment contained an error, which resulted in a portion of the supporting infrastructure for this feature becoming unhealthy and this impacting event. Next steps: - We're reverting the licensing check change throughout the entire affected environment to further help availability and prevent future similar events. This is the final update for the event.

Title: Some users may be unable to load their calendar in the Microsoft Teams web app User impact: Users may be unable to load their calendar in the Microsoft Teams web app. More info: Affected users may experience longer loading times when accessing their calendars. Retrying may allow the calendar to load successfully. Current status: We’ve observed that the issue previously communicated under TM1527987 has not been fully resolved by the mitigation already implemented. We’re continuing to investigate the root cause and assess whether additional mitigation is needed to resolve the remaining impact. Scope of impact: Impact is specific to some users attempting to load their calendar in the Microsoft Teams web app. Next update by: Tuesday, November 3, 2026, at 6:30 PM UTC