Setting Up Exchange in Thunderbird

Article 25.02.2025

File → New → Email Account
Enter name, email address, and password. Then click “Configure manually”
Enter the following values for the incoming mail server
Hostname: outlook.office365.com
Port: 993
Connection Security: SSL/TLS
Authentication Method: OAUTH2
Username: <abc12345>@hs-regensburg.de

Enter the following values for the outgoing mail server
Hostname: smtp.office365.com
Port: 587
Connection Security: STARTTLS
Authentication Method: OAUTH2
Username: <abc12345>@hs-regensburg.de
Then click “Done”
If the login screen appears:
Enter your username
Enter your password
Optional step! Required if multi-factor authentication is enabled. Example shown with Microsoft Authenticator