Title: Some users in Europe were unable to access the Microsoft Planner service
User impact: Users were unable to access the Microsoft Planner service.
Final status: We’ve confirmed after an extended period of monitoring, that the rollback is complete and the issue has been resolved.
Scope of impact: Impact was specific to some users in Europe who are served through the affected infrastructure.
Start time: Monday, February 12, 2024, at 8:00 AM UTC
End time: Monday, February 12, 2024, at 14:30 PM UTC
Preliminary root cause: A recent change intended to reduce overall CPU usage, unexpectedly resulted in impact.
Next steps:
– We’re reviewing our deployment procedures to help prevent similar problems in the future.
A post-incident report will be published within five business days.
