Open Thunderbird and, when prompted, check that your name is in the Your full name field and your U-M email address is in the Email address field.

How do I set up Thunderbird for use with U-M Google Mail? Resolution U-M Google Mail, Mozilla Thunderbird Issue Thunderbird self-service support information can be found on Mozilla's support page. ITS does not provide additional support for any other third-party mail clients other than assisting in getting Thunderbird configured for use. To best accommodate accessibility needs for U-M Google users having issues with the web-based Gmail experience, ITS provides a way to auto-configure Thunderbird, which can be found below. Google does not support the use of third-party apps or incidents that might result from using them. NOTE: The ITS Collaboration Team recommends using only apps and clients created and supported by Google or web browsers to connect to U-M Google accounts. Third-party apps and clients are created by a group or company other than Google.

Thunderbird gmail settings