Microsoft 365 dropped support for IMAP - Outlook Integration OAUTH

[JayBee4pl]

For sending mails i needed to use my personal login to send mail as the group mailadress.

[tobias]

we still have a war in our country and situation is not very promising, so such small problems are not perceived as problems at all in comparison.

Let's support the guys and purchase the Outlook Integration. I just did and it works just fine.
cc yuri

[JayBee4pl]

Great, now all sent groupmails are in my personal sent folder

[macistda]

You need O365 "full mailbox", not a O365 sharedMailbox for your groupmail then.