I do not know if you are using the basic Window Mobile setup or the Odyssey Client. The Odyssey Client came preinstalled on my X50v and is in the icon tray at the bottom of the today screen. The Odyssey client should be able to do this, because I have read it supports RADIUS. I use it myself and it makes it much easier to connect to multiple WiFi access points. Like Jermiah says, you will most likely need to contact IT to know what to set some things. I downloaded a manual for the Odyssey client, but the file is at work. I found it
www.funk.com.