I am trying to send an email using the smtp.office365.com server. It always return the same error:
5.7.57 Client not authenticated to send mail.
As far as I know, the problem is related with the fact that I'm working with ADFS. So I have previously federated my domain to work with Office 365. When I try to log in to Office, I'm redirected to the login page of my platform, which is fine.
Is there a way to send email using the Office smtp server when working with ADFS?