Microsoft Outlook for Mac
The server for account "..." returned the error "[AUTHENTICATIONFAILED]
Authentication failed." Your username/password or security settings may
be incorrect. Would you like to try re-entering your password
The server for account "..." returned the error "[AUTHENTICATIONFAILED]
Authentication failed." Your username/password or security settings may
be incorrect. Would you like to try re-entering your password
Contact Microsoft for support with Microsoft products. Excerpted from Contact a third-party vendor - Apple Support:
Microsoft Outlook for Mac