Sunday, August 09, 2020

M365 Service Health Notification

Microsoft

Exchange Online service alert

Incident information

Title: Some users may be unable to connect to the Exchange Online service
ID: EX220079

Status

Service Restored

Details

Title: Some users may be unable to connect to the Exchange Online service

User Impact: Users may have been unable to connect to the Exchange Online service when using the Outlook client.

Final status: We've identified that a section of infrastructure, responsible for directing access requests, was performing below acceptable thresholds. We restarted the affected infrastructure, and confirmed the issue has been mitigated after monitoring the environment.

Scope of impact: Impact was specific to users who were served through the affected infrastructure.

Start time: Sunday, August 9, 2020, at 6:09 AM UTC

End time: Sunday, August 9, 2020, at 7:30 AM UTC

Root cause: A section of infrastructure responsible for directing access requests was performing below acceptable thresholds, resulting in impact.

Next steps:

- We're analyzing performance data and trends on the affected systems to help prevent this problem from happening again.

This is the final update for the event.

Thank you,
The Microsoft team

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