I'm trying to configure a users account to sync with his exchange mailbox both over 3G (already set up and working perfectly) and over the office WiFi. I couldn't get a straight answer on why this is necessary but I'm still trying to get it sorted. The phone is set to sync to the FQDN and I have a hosts file on the server that points from the FQDN to the server's IP and it test's okay from a desktop machine. Any ideas on what I've missed?