Microsoft has confirmed a global issue with Microsoft Teams where it is not accessible to a number of users. Users that have been logged in prior to 8:30 am today may still have access to all the functionality of Microsoft Teams. All other users who are not currently logged in will not be able to access functionality.
For those who cannot login, there are some alternatives to accessing files. Certain functionality (such as Teams meeting) will NOT be available for those who cannot login.

We expect that this degradation will be resolved in the next few hours and IT Services will provide an update when the issue has been resolved.

In the meantime, you may be able to access your files through this URL:
https://queensuca.sharepoint.com/_layouts/15/sharepoint.aspx

You may also be able to access your files by going to your O365 home page and scrolling down to “recent docs” through this URL:
https://www.office.com/

If you need further assistance, please contact the IT Support Centre at x36666.

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Previous Description (February 3, 2020 09:44):

IT Services is beginning to receive reports of users unable to access Microsoft Teams. This degradation in service has been confirmed by Microsoft. It is currently a global problem affecting multiple customers.

User Impact: Users may be unable to access Microsoft Teams.

Current status: Microsoft is investigating an issue where users may be unable to access Microsoft Teams. Microsoft is reviewing systems data to determine the cause of the issue.

Scope of impact: This issue may potentially affect any user attempting to access Microsoft Teams.

Work Arounds: Some users report success when accessing Teams on different devices.

This notice will be updated when more information is available.