Tuesday, Oct. 5, 2021, 4:30 pm
This issue has been resolved.
Tuesday, Oct. 5, 2021, 5:39 a.m. update:
Microsoft has identified the root cause and have implemented a fix. They will continue to monitor their servers until the service has a full recovery.
Issue started at 5:42 pm Monday Oct. 4 2021.
Some users may be unable to access Outlook on the web or use some features across Microsoft 365 services. Microsoft is aware of the issue and are working towards a solution.