Last night, osTicket suddenly stopped fetching emails from our MS365 Exchange Online server. SMTP still works. Log is showing login errors, and when I tried to verify the log in settings, it is giving me a login error. The cron job to fetch emails is working. I am able to log in to the subject email account on outlook.com. We are logging into outlook.office365.com using IMAP+SSL on Port 993. I have verified that this is not a general email problem as we have other application accounts that are working. I upgraded to 1.15.8 this morning and that didn't change anything?
Mail Fetch Suddenly Stopped Working
Sounds like you have modern auth forced for your account. Here is a guide on how to reinstate basic authentication:
Once v1.17 stable is released you can setup modern authentication.
Cheers.
That worked. Thank you!
Better late than never, my MS 365 Exchange Online tenant finally gave me a Service Help notice that IMAP4 Basic Authorization was disabled right at the time this stopped working. They disabled it for 48 hours, then are re-enabling it until they turn it off for good on October 1, 2022. That appears to be the "hard" deadline for getting modern authentication working.
We've been aware of this since they announced it. Don't fret, we are going to have stable released before then. Stay tuned.
Cheers.