(Resumed) Microsoft 365 Outlook and Calendar access issue on 17 Jan

Microsoft issued an incident report on 17 Jan 2022 (Mon).

Users Affected CUHK Staff, Students and Alumni
Start Time 17 Jan 2022 (Mon) 1:20PM
End Time 17 Jan 2022 (Mon) 4:21PM
Service Affected Users may be unable to access their mailboxes and calendars via any connection method
Microsoft Updates User Impact:
Users may be unable to access their mailboxes and calendars via any connection method.
Final status:
Microsoft reverted the code change, which remediated impact and restored availability. We monitored the service as it recovered and confirmed that the service was healthy.

Scope of impact:
This issue affected some users attempting to access their mailboxes and calendars via any connection method.

Status Resumed

Last update by Microsoft: 17 Jan 2022 (Mon) 04:36 PM