I'm having some trouble getting the plugin set up to work with Office365. I have added my IP address to the whitelist in the Office365 admin. It looks like I'm also clear on https://testconnectivity.microsoft.com/ to send email from an external source. All the tests are valid. But I'm still getting an auth error.
Microsoft says that the plugin is sending the credentials in the "wrong" format. Can anyone confirm that this plugin does in fact work with Office365 not on GoDaddy but from Microsoft?