Monday, July 13, 2020

M365 Service Health Notification

Microsoft

Exchange Online service alert

Incident information

Title: Any user can't access Outlook on the web
ID: EX218368

Status

Service Restored

Details

Title: Any user can't access Outlook on the web

User Impact: Users may have been unable to access Outlook on the web.

Final status: We've received confirmation from users and through our internal monitoring that service is restored.

Scope of impact: This issue may have affected any user accessing the affected portion of Outlook on the web infrastructure.

Start time: Monday, July 13, 2020, at 7:39 AM UTC

End time: Monday, July 13, 2020, at 10:05 PM UTC

Root cause: A recent client update was deployed before the update was fully propagated within our Outlook on the web service infrastructure.

Next steps:

- To help prevent similar impact in the future, we're further investigating what prevented the update from being fully propagated within our Outlook on the web service infrastructure.

This is the final update for the event.

Thank you,
The Microsoft team

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