The same here... all of the workaround have been tested (deleted profile, allowed spotlight permissions...) but no chance. Very frustrating, paid for a working software with a tons of features and the basics are not available... it doesn't matter if it is a problem from apple or ms. It's a BIG problem. I'll switch to something else but I'm getting really angry.

MS and Apple still on Christmas holidays... No chance in switching to new outlook version, it supports "only" Microsoft 365 Exchange Online, Outlook.com, Google, iCloud, Yahoo, POP or IMAP account. Useless if you have your Exchange on prem. Getting really angry with this situation, after 10 days still in the clue...

"new Outlook" (interface) is definitely not a chance, since it is not supporting exchange server on prem.