SMTP Port 25 open outgoing Office 365 Bizhub Scan to email

Sorry about the long Subject line. 

I replaced a firewall that we couldn't access at a Church with a Sophos XG115 running SFOS 17.0.6 MR-6. We use Office 365 at the church. I set up a connector on office 365 that accepts mail from our bizhub copier through SMTP port 25. 

So when I installed the Sophos it broke this connection. I need to reconnect this. I guess the Sophos has a SMTP proxy and I guess this is grabbing the send command from the copier. The copier is basically unconfigurable...it sucks....Anyone have a suggestion on how to fix this situation. 

Thanks in advance for the help!

Biff