Thunderbird update configuration when moved to cloud
From ITSwiki
April 2023: Needed changes in account settings when mailbox moved from local DTU mail server to outlook365.com
See File:Thunderbird - moving mailbox from local to cloud.pdf
Known Issues
Oauth does not work in older versions of Thunderbird, even if it is shown as an option.
You may need to delete your current DTU account from Thunderbird and update or reinstall the program.