With the combination of Office 365 and Active Directory, you will have to set up an App Password to use instead of the regular password. Alternatively, you can create an Office 365-specific user to use as a service account for sending mails.
With the combination of Office 365 and Active Directory, you will have to set up an App Password to use instead of the regular password. Alternatively, you can create an Office 365-specific user to use as a service account for sending mails.