I apologize, we were testing a bunch of scope options and I suggested the wrong one. For the scopes use offline_access https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All https://outlook.office.com/SMTP.Send
- this will cover all that we need for access tokens for IMAP/POP and SMTP. You may need the new build of the Plugin and RC2 which should be released today. So if using that information and those scopes still cause issues then you'll need to wait for RC2.
I will say that I'm running into an issue with my Personal Outlook account. I get the error MailboxNotEnabledForRESTAPI - The mailbox is either inactive, soft-deleted, or is hosted on-premise.
after singing in and consenting to scopes. I reached out to microsoft support and they told me this issue is on their end and that "they are working hard to resolve the issue".
Cheers.