One of the biggest problems faced by many people is getting the error code caa20002 while trying to sign into Microsoft Teams. This issue occurs due to a number of reasons including incorrect settings, corrupted data, and even network connection issues. In case you're facing similar issues, here is how to clear cache files that could help you resolve this error.
Open up Command Prompt window and type "cmd". Press Enter.
Type "ipconfig /flushdns", and press Enter.
Type "ipconfig", and press Enter.
Check whether the DNS server address is set correctly.
If not, change it accordingly.
Restart your computer.
Sign in to Microsoft Teams.