Tuesday, September 08, 2020

M365 Service Health Notification

Microsoft

Exchange Online service alert

Incident information

Title: Users may intermittently be unable to access all Exchange Online connection methods
ID: EX221691

Status

Service Restored

Details

Title: Users may intermittently be unable to access all Exchange Online connection methods

User Impact: Users may have intermittently been unable to access all Exchange Online connection methods.

Final status: We've rebalanced traffic throughout the affected infrastructure and confirmed via monitoring the service that this action has successfully resolved the issue.

Scope of impact: Your organization was affected by this event, and all users attempting to access Exchange Online connection methods may have intermittently been impacted.

Start time: Tuesday, September 8, 2020, at 3:13 PM UTC

End time: Tuesday, September 8, 2020, at 8:15 PM UTC

Root cause: An unusually large amount of traffic had resulted in intermittent Exchange Online connection access issues.

Next steps:

- We're analyzing request loads and reviewing traffic optimization improvements on the affected Exchange Online infrastructure to help prevent similar access issues from reoccurring in the future.

This is the final update for the event.

Thank you,
The Microsoft team

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