Mac Authentication Error Starting 8/7/2024

Hello kevinf47

Good day and thanks for contacting Microsoft community support.

Based on the information provided, the issues you are encountering with Teams for Mac appear to stem from recent updates that are interfering with authentication and connectivity to your work account. This kind of problem is not uncommon following updates. However, we need more information on the issue to better assist you.

1. Are you able to access your work account on other devices, such as iOS or web, without any issues?
2. Have you cleared the Teams cache on your Mac? (Navigate to ~/Library/Application Support/Microsoft/Teams/ and delete the contents of the folder.)
3. Are you experiencing any issues with other Microsoft services or applications, or is it isolated to Teams?
4. Have you tried resetting or reinstalling MS Teams on your Mac?

Please share this information with us private message.

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I'll wait for your next update on this in a private message. I will provide you with further guidance accordingly.

Sincerely,

Bertrand

We have a Mac user that is also experiencing the same issue on just the Team desktop app.

They said it started at the end of July.

They have cleared the cached, reinstalled Teams (version 24180.211.3017.6653), upgraded to latest OS on Mac, but they are still getting the same error message for the desktop app. "We couldn't authenticate you. This could be due to a device or network problem, or Teams could be experiencing a technical issue."

This lines up with the release of Mac OS 14.6. I doubt 14.6.1 would have this fix in place. I'm still stuck if you needed that info.

Hello,

I have the exact same issue on my Mac, which started around the same timeline shared in this thread (end of July).

I tried all the steps suggested above, including the following:

1. Tried in other clients (Android, Web) --> Works well in those, with no issue
2. Cleared the Teams cache on my Mac, twice --> faced the issue again
3. All other Microsoft apps work well (Outlook, Word, Powerpoint, etc). The issue is isolated to Teams
   1. In fact, even when facing the issue, Teams is the only app I need to sign-in for again. All other Microsoft apps keep working fine
4. I deleted the app altogether, and reinstalled it from scratch. Still face the issue, unfortunately

Are there any other suggestions to try?

Thanks,

I just installed Parallels and Windowss and it works. It's crazy to me that the Microsoft provided software can't authenticate my Microsoft based login. This whole thing is now costing me money.