Issue
I am trying to set up my UMD email account in Thunderbird, using IMAP and OAuth2. I receive an error Unable to log in at server. Probably wrong configuration, username, or password.
Environment
Thunderbird app for reading UMD email.
Resolution
NOTE: IMAP is enabled by default, and no additional steps are required from users.
Clear cached Gmail credentials in Thunderbird:
- Go to Settings, then select Privacy & Security.
- Click Saved Passwords.
- Remove all Gmail/Google entries.
- Restart Thunderbird. You should be able to connect now.