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Monday, July 15, 2024

Sign in Issue on Teams Windows Client

Windows Client stopped working all of a sudden. User can work on a different computer , Web App works and mobile app works.

We’re Sorry – We’ve run into an issue.

Try again

if that doesn’t work try signing out and back in.


We need you to Sign in ! Either your password changed or the server needs your sign-in info again.



We weren’t able to connect. Sign in and we’ll try again. Sign in.


Same Solution for users showing a unknown user in Windows thick client

Solution –

Tried Quitting the application

Tried restarting the computer

Web https://teams.microsoft.com works.

Start – run –




Teams Folder to Teams.old


Restart Teams client.

Satheshwaran Manoharan
Satheshwaran Manoharanhttps://www.azure365pro.com
Award-winning Technology Leader with a wealth of experience running large teams and diversified industry exposure in cloud computing. From shipping lines to rolling stocks.In-depth expertise in driving cloud adoption strategies and modernizing systems to cloud native. Specialized in Microsoft Cloud, DevOps, and Microsoft 365 Stack and conducted numerous successful projects worldwide. Also, Acting as a Technical Advisor for various start-ups.

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  1. Just fyi, you just need to delete the settings.json file from that folder, and restart MS Teams.


    • Quitting Teams via system tray right-click -> quit then renaming settings.json to settings.json.old then starting teams caused it to prompt me for credentials and then it started working again. Very strange. Something was holding the Teams directory tree open so I couldn’t rename it, so I’m glad this comment about settings.json was here since that worked. Thanks!

  2. error code – caa70004

    Just removing the settings.json file didn’t work.
    Renaming Teams folder didn’t work.
    Removing stored credentials didn’t work,
    TLS 1.1, 1.2 and 1.3 are ticked in IE Options.
    PC reboot didn’t work
    Reinstall didn’t work

    Logs definitely show the issue as being authentication. Works online
    I’m out of idea. Anyone got any more?

  3. Quitting teams entirely using the task-bar icon (right click and select “Quit”) and then reopening the app resolved the issue for me.

  4. This happens to me constantly at least once an hour. Ended up having to create a delete json batch file to run before restaring the app as no fix is permanent!


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