Hi, I've been using Office 365 on Thunderbird (IMAP) for years without problems, and have the MFA disabled and then yesterday out of the blue when I opened Thunderbird, It kept saying password is incorrect for the 2 accounts I have, and everything is correct actually. I removed the accounts and when I added them back again, I got the below message: Configuration could not be verified.  If your username and password are correct, it's likely that the server administrator has disabled the selected configuration for your account.  Try selecting another protocol. I don't want to use a third party add on Thunderbird to use Exchange in configuration, how can I fix this issue to keep using Thunderbird with IMAP? Thank you