Office 365 email setup for Thunderbird (Pop/IMAP – Modern Authentication)
T Thunderbird is a free email application that’s easy to set up and customize – and it’s loaded with great features. Thunderbird will need to be updated to version 77.0.b1 or higher in order to work with Office 365. You can download the latest version of Thunderbird here. You need to ensure that you have already configured app registration in Azure Active Directory and granted users access to use the application. If not please follow steps in our earlier blog here.Pre-requisites
Setting up Thunderbird
The settings you see should be:Username: username@domain.com
Password: Office 365 password
Protocol: IMAP
Incoming (IMAP): outlook.office365.com SSL
Outgoing (SMTP): smtp.office365.com STARTTLS
Manual Server Information
Username: username@domain.com
Password: Office 365 password
Incoming: IMAP
Server: outlook.office365.com
Port: 993
SSL Enabled: Yes
Authentication: OAuth2
Outgoing: SMTP
Server: smtp.office365.com
Port: 587
SSL Enabled: STARTTLS
Authentication: OAuth2