Set up Thunderbird

You can download the app and find instructions on how to use it at https://www.thunderbird.net.

Connecting to an individual mailbox

Use the following settings to connect to an individual mailbox:

IMAP

• IMAP server: outlook.office365.com
• IMAP port: 993
• IMAP connection security: SSL/TLS
• IMAP username: [CRSid]@cam.ac.uk
• IMAP authentication method: OAuth2

SMTP

• SMTP server: smtp.office365.com
• SMTP port: 587
• SMTP connection security: STARTTLS
• SMTP username: [CRSid]@cam.ac.uk
• SMTP authentication method: OAuth2

When authenticating, you'll see the usual Cambridge University screen for your username, password and then multi-factor authentication (MFA). You must ensure that your username on that screen is [CRSid]@cam.ac.uk, and that you use your associated password and additional authentication mechanism.
 

Connecting to a shared mailbox

Use the following settings to connect to a shared mailbox that you have authority to access. In this example, your username is your individual mailbox in the format [CRSid]@cam.ac.uk and the shared mailbox is in the format [mailbox]@[domain].cam.ac.uk.

IMAP

• IMAP server: outlook.office365.com
• IMAP port: 993
• IMAP connection security: SSL/TLS
• IMAP username: [mailbox]@[domain].cam.ac.uk
• IMAP authentication method: OAuth2

SMTP

• SMTP server: smtp.office365.com
• SMTP port: 587
• SMTP connection security: STARTTLS
• SMTP username: [CRSid]@cam.ac.uk
• SMTP authentication method: OAuth2

When authenticating, you'll see the usual Cambridge University screen for your username, password and then multi-factor authentication (MFA). You must ensure that your username on that screen is [CRSid]@cam.ac.uk, not [mailbox]@[domain].cam.ac.uk.