Dear Amber Reece Pollard
Good day!
Thank you for posting to Microsoft Community. We are glad to assist!
Based on your description, I understand you concern with unable to access Teams.
You may need to have a try to do following troubleshooting for narrowing down your issue:
- Clear Teams cache: You may have a try to clear Teams cache in Teams for Mac, you can refer to Clear Teams cache - Microsoft Teams | Microsoft Learn.
- Remove Credentials for Mac: You may have a try to open Finder > Search **Keychain Access >**Remove the Identities related to Microsoft Teams or Microsoft Office.
- You may have a try to use other browsers to sign into Teams with your account and check whether there is any difference.
If the issue still persists, could you please kindly share me the screenshot of the error, so that I can provide you further check.
Please note that our initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.
Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!
Best regards,
Allen | Community Moderator