The obvious question is are you sure you are putting in the right password?Just recently when trying to login to my Hotmail/Outlook eMail account on my MBA running the most recent Catalina version, it will NOT accept my Password!
Any and all input/direction will be much appreciated.
What happens when you click on "Forgot Password?" and follow the prompts?
Generally when someone asks for password help, it isn't for their own account. When it's their first post, as in this thread, it's a pretty solid interpretation.