Using Outlook for Android for personal email and calendar management
Delete your Microsoft email account and start over. App passwords won't work or they won't work all the time - you'll still get every once in a while, an issue being authenticated.
So in summary if you're still having trouble:
- Make sure you have MS authenticator setup for your email account
- Delete your email account in BB hub
- follow the steps I outlined above and re-setup the account using the sign into Microsoft account and verify with authenticator