OMA with SBS pop3 connector

We have SBS2003 and download emails via pop3 connector.Also have a firewall with static ip address. Users can check emails via OWA by typing ip address of firewall and port fwding points to my sbs server and everything works fine. Now I want to give a couple of users email access via OMA. Is it possible and what should I do to make it happen..

Many thanks for any suggestion