Forum Discussion
Microsoft 365 automatically unchecks the Authenticated SMTP under a user
Do you know why Microsoft 355 is automatically unchecking the "Authenticated SMTP" under a user?
Our server and configuration have not changed, or update and we never had this problem.
Last week we noticed that the "Authenticated SMTP" was unchecked, for the only user that is setup, and we corrected the problem by checking the box but a day later we are facing the same problem and having to constantly go to Microsoft 360 to check the "Authenticated SMTP"
Can you please let me know what to do to fix this problem?
Thank you
2 Replies
Hi, it might be caused by security settings that automatically disable basic SMTP authentication. For example, if you’ve enabled “Security Defaults” or a Conditional Access policy that blocks “Legacy Authentication,” Microsoft 365 may uncheck the box on its own. Check your EntraID security settings, and if you need SMTP Auth, you’ll have to either exclude that user or disable the policy that’s blocking it.
Hi, yes this is exactly what I am finding out. I talked to the application that we are using, and they are making changes to fix this problem by removing the simple user ID/PW that is required to set SMPT authentication and adding the new layer that is required to fix this problem.
Thank you for your response and I consider this problem fix.
