Some users in the United States may have been unable to access multiple Microsoft 365 services
ID: MO1273099
Issue type: Incident
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Impacted services
Microsoft 365 suite
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Details
Title: Some users in the United States may have been unable to access multiple Microsoft 365 services
User impact: Users may have been unable to access multiple Microsoft 365 services.
More info: Impacted services included but weren't limited to:
- Microsoft Teams
- Exchange Online
- Microsoft 365 Suite
Specifically, users may have experienced sudden disconnects, increased latency or intermittent access issues.
Final status: We've determined that a connection with a third-party internet provider unexpectedly became overloaded with user traffic, causing latency and disconnects across multiple Microsoft 365 services. We've redirected affected traffic to alternate infrastructure and confirmed impact is no longer occurring after a period of monitoring.
Scope of impact: Impact was specific to some users in the United States attempting to access Microsoft 365 services.
Start time: Tuesday, April 7, 2026, at 1:20 PM UTC
End time: Tuesday, April 7, 2026, at 1:50 PM UTC
Root cause: A connection with a third-party internet provider unexpected became overloaded with user traffic, causing latency and disconnects across multiple Microsoft 365 services.
Next steps:
- We're analyzing traffic performance data and trends on the affected infrastructure connection to help prevent this problem from happening again.
This is the final update for the event.
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