Error code caa20003 pops up if signing into Teams or any other Office 365 apps, for that matter.
It indicates your date and time parameters might be incorrect or youre not authorized to sign on.
Let your rig automatically adjust your date and time options.
Using inaccurate date and time controls may prevent you from connecting to secure sites those using HTTPS.
Then see if the error is gone.
Another key point is to disable all your net net app extensions.
Navigate to Windows tweaks Accounts Email & Accounts.
If youre using a work or school account, you oughta go to options Accounts Access work or school.
Re-connect to your account and peek if error caa20003 is still there.
Additionally, test whether theyre in the right AD group.
Also, ask them to access Teams from the Microsoft 365 web portal.
The test will show if this is indeed a user authentication problem.
