[extr0pian]

I'm using Thunderbird on Linux with an Outlook work account. Granted, I have to pay for 'Owl for Exchange' for it work, but I absolutely hate the Outlook program, I'm willing to fork out the $10/yr of my own money just to avoid it.

[jfhufl]

If you still have IMAP access, thunderbird supports OAuth2 for connecting to O365 IMAP. tbsync for calendar access. Seems to work pretty well currently.

[testrun]

That is my setup. Works 100%.

[procarch2019]

No more IMAP

[procarch2019]

Need MS for other toolings