Sending email does not work with Office365 SMTP
During November my Thunderbird client 128.5.1esr (and the previous release too) stop sending email with my employer Office365 account. I can download email (IMAP) but not send email. I get the following window after a few seconds (see screenshot below):
Login to account "Microsoft 365" failed Login to server smtp.office365.com with username XXXXX failed.
[ Enter New Password ] [ Cancel ]. [ Retry ]
The password is correct but if I try to Enter a New Password, nothing happens. Retry displays the same window again. I see that many people had this problem in the past and I have tried all possible solutions to no avail (configuration is correct, deleting and creating the account again, etc.).