Update: The full timeline for retirement of Basic Authentication in Exchange Online is now published in Basic Authentication Deprecation in Exchange Online – September 2022 Update.
In about 150 day...
Updated Sep 01, 2022
Version 5.0
Blog Post
While the deactivation of basic authentication for POP/IMAP is a good idea in general, I'm still struggling with the change because I cannot seem to find a way to have a NON-INTERACTIVE application query mail accounts.
I'd need a way for a windows service to periodically scan a mail account for mails with certain attachments and then download those.
So far, using basic authentication with POP3 or IMAP was no problem, but since this has been switched off, authentication fails.
My first idea was to ask our exchange admin for an app password, but from what I read here, app passwords won't work either.
So what to do for a non-interactive use case where OAuth is not usable?