Fabian Arrotin writes: [...]
For a previous job, I was using davmail (http://davmail.sourceforge.net) to act as a imap/caldav/ldap gateway between my Thunderbird and the OWA. I never tested against outlook365 but a simple google search seems to indicate that it's doable/working
Going through various stages of the corporate email outsourcing craze with different versions of Exchange, I have never ever gotten davmail to work. Never tested it with o365, and don't care as long as they don't cancel imap here. Don't see that happening, however.