i’ve this problem SMTP client error: internal client error: No compatible authentication mechanism was found
when i try to send an email test i got an error : ERROR sending SMTP test email 400 Bad request Unknown
and when i try to add a member i got this error SMTP client error: internal client error: No compatible authentication mechanism was found
We don’t support oauth2 (yet) and if Microsoft doesn’t support other authentication mechanisms you’ll have to switch to a different provider or use an email proxy for this as suggested in this thread