Exchange Active Sync over FIOS?

[devicemanager]

I have a Mogul from Sprint. Has anyone been able to sync over the air with exchange on FIOS. I believe that port 80 inbound is being blocked and that is my problem. Mail flows and I can acess the owa if I move it to port 443 mail.domain.com:443 - only works in this manner. When I specify that address in the phone under active sync it clears it and replaces it with maail.domain.com - Is there a hack for the phone to make it look at a different port? Any information will be helpful...