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Exchange Online mailboxes unavailable

November 12, 2025 at 11:55 PM UTC

Microsoft

Resolved after 144h 15m November 19, 2025 at 12:10 AM UTC

False Positive | 06:10pm Central - Microsoft reports that after further investigation, the issue was determined to be a false positive. If the issue is occurring, please contact the Technology Services Department. This will be the last update.

Report Received | 05:55pm Central - We are investigating a potential issue that might affect the uptime of one of our services. Microsoft reports that users are unable to access their Exchange Online mailbox via any connection method. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.

Last updated: November 18, 2025 at 7:51 PM UTC