Thunderbird Configuration

/!\ Note: CCS does not provide support for configuration or use of Mozilla Thunderbird as a email client. For support for Thunderbird, please refer to Mozilla Support.


Follow the steps below to configure Thunderbird to connect to Office 365:

  1. Open Thunderbird, and under the "Create a new account" section select "Email". If a window pops up asking you "Would you like a new email address?", click "Skip this and use my existing email". Illustrates the screen as well as the "Add a new account" feature.
  2. Type in your full name, email address and the password. Once completed, click "continue". Visualization of the "Mail Account Setup" window.
  3. The configurations will pop up, but it will require changing the information. Click "manual config" to customize the settings.
     Visualization of the "manual config" button
  4. The following settings (IMAP, SMTP, username incoming, and username outgoing) are for the configuration. Once you are done, it should look similar to the window below. Listed under the window are the settings for IMAP and SMTP.Visualization of the IMAP and SMTP settings.

IMAP Settings

  • Server name: outlook.office365.com
  • Port: 993
  • Encryption method: SSL/TLS
  • Authentication : Normal password

SMTP Settings

  • Server name: smtp.office365.com
  • Port: 587
  • Encryption method: STARTTLS
  • Authentication : Normal password

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