In the Accounts Settings window, click Server Settings in the left panel.Under Accounts, click View settings for this account. Click your account name to display the Thunderbird main window.Note: Do not subscribe to the Calendar folder. Make sure the Deleted Items, Drafts, and Sent Items folders (and any other folders you want to access in Thunderbird) are selected and then click Subscribe.Right-click your account name and click Subscribe.This will make it less confusing if you also use webmail or another email client to access your Office 365 email. We also recommend keeping sent messages and drafts in the Sent Items and Drafts folders in webmail folders on the server. This setting allows you to recover deleted items. We recommend that you configure your Thunderbird to move your deleted messages to the Deleted Items folder on the server (webmail). You should be prompted to complete the normal web-based two-factor authentication process.Click Done. The Thunderbird main window displays.Username (Incoming and Outgoing): your SUNet If you do not have OAuth2 as an authentication choice you can click the Re-test button after filling in the server information. This will fail and a message saying 'Thunderbird failed to find the settings for your email account' will display. Thunderbird will attempt to automatically configure your account settings.

Enter your name as you want it to appear in the From field in outgoing mail and your email address.

When asked if you would like a new email address, click Skip this and use my existing email.

Launch Thunderbird and choose to create a new Email account.Set up a new Thunderbird accountĪfter installing Thunderbird you need to configure it for use with your mailbox. Follow the instructions on the site for installing Thunderbird. These instructions require Thunderbird version 78 or later. You can obtain a free download of Thunderbird from the Mozilla website. To request access to IMAP, please submit a Help request. With IMAP you can only access your email, not your calendars, contacts, or tasks. Thunderbird lacks Exchange support so it needs to be configured for IMAP.

Office 365 email client setting