Using classic Outlook for Windows in business environments
I agree with Frank. I use Mailbird as well and they've been extremely helpful, but obviously disconcerted at Microsoft's lack of a timely resolution.
Mailbird's suggestions to change the server for IMAP only work intermittently. I've been able to get the account to work by completely closing Mailbird and reopening it. Several times a day. This is better than not working at all, but this is completely unacceptable on Microsoft's part.
If Microsoft can't resolve this soon, I'll be canceling my subscription and looking for a different email account.