How to add an Exchange email account to Thunderbird email client?

Step 1: Click on the three bar icon on the top-right and select New > Existing mail account.

Step 2: Enter your Name, Email Address, and Password in the boxes, and click Manual config.

Step 3: In the IMAP field enter outlook.office365.com.

Step 4: In the SMTP field enter smtp.office365.com.

Step 5: Click on Re-test and then click on Done.