IT Notice: Mosaic and McMaster Mail issues resolved

Update: Issues with Mosaic and McMaster Mail have been resolved by UTS and Microsoft.

Please be advised that you may be experiencing slowness or service interruptions within the McMaster Mail email and calendaring service.

University Technology Services (UTS) is working to resolve these issues and will keep the campus community informed.

  • Microsoft is experiencing a global issue with its mail service and continues to address the desktop client issue for McMaster Mail email and calendaring service. If you are affected by this issue, please use the browser version at

Please see the UTS dashboard for further updates: