How Can I access my server 2003 via wireless

Hi I have a small network setup for local church school in my area. I setup server 03 and enabled NAT and VPN role. The workstations in the classrooms are connected to the server through a switch. I also have a few laptops that connect via wireless to the internet, but now can’t see the server’s outbound address.
Can anyone assisst me with this please? THANKS