Incident Discovery Time: 10:10am on 06/05/2023 Time of Resolution: 01:13pm on 06/05/2023 Services Impacted: Email & Calendaring

Description of Impact

MICROSOFT HEALTH STATUS FINAL UPDATE: Microsoft is reporting issues accessing OWA (Outlook on the Web). Clients are having issues logging into Outlook on the web.

Incident Description and Resolution

MICROSOFT HEALTH STATUS UPDATE:

Final status: We’ve completed the restarts to address the residual impact, and after an extended period of monitoring, we’ve confirmed that the issue is resolved. We continue to investigate why the update caused impact and further details will be provided within the Post-Incident Report.

Root cause: A recent update, intended to add additional resiliencies against downstream requests remaining in a hanging state, inadvertently caused impact.

Next steps: – We’re reviewing dump files gathered from impacted components during the incident to better understand why impact occurred. – We’re investigating to content of the update to identify the underlying root cause. We’ll publish a Post-Incident report within five business days.

– Incident Discovery Time: 10:10am on 06/05/2023 Services Impacted: Email & Calendaring

Description of Impact

Microsoft is reporting issues accessing OWA (Outlook on the Web). Clients are having issues logging into Outlook on the web.

Current Status

Microsoft 365 Health Status: We’ve reverted a change which occurred just prior to impact starting and after service replication took place, telemetry is showing significant improvement in availability across the service. Additionally, we’ve received confirmation from previously impacted users that the issue is no longer occurring. We’re continuing to monitor to ensure recovery and are isolating any sections of the service showing residual impact which would require additional recovery actions. Next Update: 01:40pm

Previous Update

– Incident Discovery Time: 10:33am on 06/05/2023 Services Impacted: Email & Calendaring

Description of Impact

Microsoft is reporting issues accessing OWA (Outlook on the Web). Clients are having issues logging into Outlook on the web.

Current Status

11:09 AM Current status: We’re continuing to review monitoring health systems targeted at networking, Client Access Front End (CAFE) routing, and database storage to determine the underlying cause of the issue. 11:29 AM Current status: We’re reviewing monitoring health systems targeted at networking, Client Access Front End (CAFE) routing, and database storage to determine the underlying cause of the issue. Next Update: 12:48am

Previous Update

– Incident Discovery Time: 10:33am on 06/05/2023 Services Impacted: Email & Calendaring

Description of Impact

Microsoft is reporting issues accessing OWA (Outlook on the Web). Clients are having issues logging into Outlook on the web.

Current Status

Current status is Microsoft is investing. Next Update: 11:33am