Hi. I struggled to get it to work, but was successful with these settings.
Office 365 requires that support email match the Outgoing Mail settings, otherwise it refuses to connect and transmit email)
- Site administration / Server
- Support Contact
- Support name = Your company
- Support email = your email
- Save changes
- Site administration / Server
- Outgoing mail configuration
- SMTP hosts = smtp.office365.com:587
- Security = TLS
- Auth type = LOGIN
- SMTP username = same as support email
- Pass = the password
- Session limit = 10
- No-reply address = same as support email
- Allowed domains = domain of email address
Hope that helps
Regards
Brendon