When adding an Exchange account, originally Autodiscover fails after a few minutes because it tried to find an Exchange server at the TLD. However, that domain name's e-mail is hosted by Office365. After failing the first time, Airmail then asks for a server, which is outlook.office365.com. Clicking "Add," again, I get the same error: "Autodiscover Failed."

Attached is a screenshot of the error. The e-mail address is not @hotmail.com, @outlook.com, or any of the free Microsoft e-mail offerings.