Microsoft says Outlook.com outage is causing sign‑in failures
BleepingComputer • • general
Key Points:
- Microsoft is investigating an ongoing Outlook.com outage causing intermittent sign-in failures and preventing users from accessing their mailboxes, with thousands of reports logged on Downdetector.
- Affected customers are experiencing unexpected sign-outs and "too many requests" errors, with Microsoft attributing the issue to client sign-in scenarios and working to validate interactions across service components.
- The outage is classified as "service degradation," indicating significant user impact without a complete service shutdown, though Microsoft has not disclosed the root cause, affected user numbers, or regions.
- Microsoft is currently reverting a recently introduced change to mitigate the issue and is closely monitoring service telemetry while analyzing customer reports to determine next steps.
- This incident follows recent Microsoft service disruptions, including an Exchange Online outage and sign-in problems affecting Office.com and Microsoft 365 Copilot services last month.
