Resolved after 9 hours 34 minutes, affecting UK: Server-Side: Mail Routing - Office 365 and UK: Server-Side: Mail Routing - Exchange, on March 17, 2026.
Engineers have confirmed that the previous service alert has been resolved. The service is now back to full health and is working as normal. Thank you for your patience.
Affected components
Update timeline
- investigating Mar 17, 2026, 10:59 PM UTC
We are currently investigating this issue.
- monitoring Mar 18, 2026, 08:10 AM UTC
We have identified what was behind the degraded service in the UK and have put a fix in place to remediate the issue. Mail routing has returned to a stable state and we are currently monitoring the situation
- resolved Mar 18, 2026, 08:34 AM UTC
Engineers have confirmed that the previous service alert has been resolved. The service is now back to full health and is working as normal. Thank you for your patience.
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