OneDrive access from Teams ends with "404 File not found"

Hi balwan ,

I understand the frustration you're experiencing with changing the Email Domain for your organization. I encountered a similar issue recently, but I managed to resolve it by following these steps:

Resolution:

1. Initially, I attempted to attach a file (whether in Chat or any Teams Channel) directly by uploading it from my device. However, this action prompted an error message.
   
2. Upon encountering the error, I closed it and proceeded to sign out of the Teams app.
3. After signing out, I then signed back into Teams.

This simple re-signing into Teams seemed to do the trick for me. It's possible that Teams needed some kind of trigger to refresh its connectivity with OneDrive following the domain change.

I hope this solution works for you as well. Let me know if you need any further assistance or clarification!