Subscribe to the needed folders by right clicking your email address and clicking Subscribe.Ħ. Please note the Email address and Username should be the same.ĥ. If Thunderbird does not apply the settings automatically, manually enter the following settings, then click 'Re-test' then 'Done' (make sure to double check before clicking next). Click on Account Actions, then 'Add Mail Account',ģ. Instructions:ġ. Open Account Settings (Tools> Account Settings).Ģ. Instructions on how to configure Thunderbird to work with Office 365.