Resolved: McMaster email and other services affected by widespread Microsoft 365 issue

Update (Tuesday, September 29, 8:55 a.m.)

Last night at 5:25 p.m. ET, Microsoft experienced an outage impacting access to several services across North America. McMaster University access to Microsoft 365 applications, including OneDrive, Teams, and Outlook, as well as login access to Zoom were impacted. After careful monitoring, Microsoft has confirmed that these issues were resolved as of 10:30 p.m. last night and access had been restored to Zoom and Microsoft 365.

If you continue to experience any issues logging into the above applications, please contact University Technology Services (UTS) via Live Chat, phone, or service ticket.

Update (9:12 p.m.)

Microsoft is indicating that their systems issues appear to be restored. This should allow everyone to access all Microsoft 365 systems as well as login access to Zoom.

Please monitor Microsoft’s own service updates here:

Original post

McMaster email and other services may be interrupted due to a widespread issue related to Microsoft 365.

Any system that uses the Microsoft authentication services may have issues. This includes, Microsoft Teams, and

Other services such as Zoom that leverage the Microsoft authentication services will also be affected.

The university is working with Microsoft to investigate and resolve the issue and will provide updates to keep the community informed.

For the latest on the issues,