Question

How do I configure my Thunderbird for Office 365?

Overview

Thunderbird will need to be updated to version 77.0.b1 or higher in order to work with Office 365 and Duo Multi-factor authentication.

Answer

1. If you do not have Thunderbird installed, download from the Thunderbird website.

2. Launch Thunderbird. Select +New Account, Existing Email Account from the 'hamburger' menu.

3. Enter your name and e-mail address. You can leave the password empty. Press Continue to have Thunderbird figure out where your mailbox is hosted. This should discover your account in Office 365 using IMAP.

4. If Thunderbird could not find your mailbox, enter the Manual Server Information below.

Manual Server Information

Incoming Server
Protocol: IMAP
Hostname: outlook.office365.com
Port: 993
Connection security: Yes
Authentication method: OAuth2
Username: Full UC Davis Email Address (email@ucdavis.edu)

Outgoing Server
Hostname: smtp.office365.com
Port: 587
Connection security: STARTTLS
Authentication method: OAuth2
Username: Full UC Davis Email Address (email@ucdavis.edu)

5.  You should be prompted with the Office 365 login page followed by the Duo prompt. Click Finish to confirm the creation of your account.

Note: If you want to view your sent items, see this Thunderbird Support page.

UC Davis technical staff offers "best effort" support for Thunderbird.