I am trying to get office 365 working with Odoo. I set it up under general settings, the test passes.
When I try to use it to send a welcome email to a new user, I get this:
Mail Delivery Failed
Mail delivery failed via SMTP server 'smtp.office365.com'.
SMTPDataError: 550
5.7.60 SMTP; Client does not have permissions to send as this sender
Any Ideas on what could be causing this?