Hello,
I am trying to set up my email account on Thunderbird for Android, but the incoming server configuration fails during the validation step.Error Message Received:"C… (read more)
Hello,
I am trying to set up my email account on Thunderbird for Android, but the incoming server configuration fails during the validation step.Error Message Received:"Checking incoming server settings failed.
Authentication error. The server returned the following message: User is authenticated but not connected."
My Environment & Setup Details:
App Version: Thunderbird 21.0
OS: Moto Edge 50 Neo, Android 16
Email Provider: Outlook.com
Server: outlook.office365.com
Protocol: IMAP
Authentication Method: OAuth2.0
I have tried so far:
Toggled between Wi-Fi and mobile data to rule out local network issues.
Verified that my login credentials work perfectly via the webmail browser interface. Completely deleted the account attempt and retried the automatic setup process from scratch.
I have attached a screenshot of the exact error screen for reference. Any guidance on how to fix this authentication loop would be greatly appreciated.
This issue has been persistent for many months now.
If any more info is needed, please feel free to reach out. Thank You