I agree that it might be not a bug, but looks like it is. We still has a problem to use system in SMTP, not only IMAP. Main ERROR: Authentication unsuccessful.
How to reproduce. We have Outlook integration module and from yesterday IMAP don't working if module is not connected by giving us authentication error, but in this case SMTP don't working by the same error. If I disconnect outlook module SMTP starts working, but IMAP stops working.
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Microsoft deprecate BASIC AUTH in IMAP protocol on October 1st, 2022
Looks like it affected our IMAP connection as we can't connect to Office 365 anymore without OAuth 2.0 support. If we enable OAuth 2.0 connection the system let login to IMAP.
## IMPORTANT NOTE ##
Microsoft intends to deprecate BASIC AUTH in all mail protocols for XO Accounts on October 1st, 2022:
Article: https://docs.microsoft.com/en-us/exc...xchange-online
Can OAuth 2.0 connection feature be implemented in CRM's mail settings by default?
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