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Massive Microsoft 365 outage causes auth issues, service failures
August 31, 2026 · BleepingComputer · Severity: MEDIUM
Microsoft is investigating a widespread service issue causing authentication issues, email delays and failures, and various other issues for Exchange Online customers.
Key Takeaways
- Microsoft 365 outage disrupts authentication and email services for Exchange Online customers.
- Widespread service issue causes delays and failures in email delivery and authentication.
- Microsoft investigates ongoing outage affecting multiple Microsoft 365 services globally.