Admins may have received delayed mailbox usage reports from the Microsoft 365 admin center

Title: Admins may have received delayed mailbox usage reports from the Microsoft 365 admin center User impact: Admins may have received delayed mailbox usage reports from the Microsoft 365 admin center. More info: Admins' mailbox usage reports may have been delayed as far back as Tuesday, February 17, 2026. Final status: We've confirmed that the reports for Microsoft 365 Groups have been processed. We've verified with affected users that impact has now been resolved. Scope of impact: Any admin attempting to view mailbox usage reports in the Microsoft 365 admin center may have been impacted. Start time: Saturday, February 21, 2026, at 1:00 PM UTC End time: Thursday, March 5, 2026, at 11:00 AM UTC Root cause: A malformed data issue within the pipeline responsible for timely report data in the admin center was resulting in mailbox usage report delays. Next steps: - We're analyzing the affected pipeline that handles report data to help prevent this problem from happening again. This is the final update for the event.

Title: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center User impact: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center. More info: Admins' mailbox usage reports may be delayed as far back as Tuesday, February 17, 2026. Current status: The mailbox usage reports has completed processing for some users, but the Microsoft 365 Groups reporting is still in progress. We expect that all reports will be available by the time of our next update. Scope of impact: Any admin attempting to view mailbox usage reports in the Microsoft 365 admin center may be impacted. Start time: Saturday, February 21, 2026, at 1:00 PM UTC Root cause: A malformed data issue within the pipeline responsible for timely report data in the admin center is resulting in mailbox usage report delays. Next update by: Thursday, March 5, 2026, at 5:00 PM UTC

Title: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center User impact: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center. Current status: We've completed deploying the fix and anticipate affected pipeline will have recovered by our next scheduled update. Scope of impact: This issue may potentially affect any admin attempting to view mailbox usage reports in the Microsoft 365 admin center. Start time: Saturday, February 21, 2026, at 1:00 PM UTC Root cause: A malformed data issue within the pipeline responsible for timely report data in the admin center is resulting in mailbox usage report delays. Next update by: Tuesday, March 3, 2026, at 5:00 PM UTC

Title: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center User impact: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center. Current status: We're completing the final validations on our fix to address this malformed data issue and deployment will begin soon. We anticipate that this fix will have completed its deployment to all affected environments by our next scheduled update. Scope of impact: This issue may potentially affect any admin attempting to view mailbox usage reports in the Microsoft 365 admin center. Start time: Saturday, February 21, 2026, at 1:00 PM UTC Root cause: A malformed data issue within the pipeline responsible for timely report data in the admin center is resulting in mailbox usage report delays. Next update by: Monday, March 2, 2026, at 5:00 PM UTC

Title: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center User impact: Admins may receive delayed mailbox usage reports from the Microsoft 365 admin center. Current status: We identified a malformed data issue within the pipeline responsible for timely report data in the admin center, resulting in mailbox usage report delays. We're currently developing a fix to address this underlying root cause and will provide a status on its progress by our next scheduled update. Scope of impact: This issue may potentially affect any admin attempting to view mailbox usage reports in the Microsoft 365 admin center. Start time: Saturday, February 21, 2026, at 1:00 PM UTC Root cause: A malformed data issue within the pipeline responsible for timely report data in the admin center is resulting in mailbox usage report delays. Next update by: Friday, February 27, 2026, at 8:30 PM UTC