been a while since I posted..
I thought that I would point that the windows server licensing allows for a choice between a user CAL or a device CAL. This allows for flexibility in the setting up the server. A per user model would allow for any number of devices to be attached to the network but only the number of CAL users could log into the computers attached to the domain. A device CAL allows for unlimited number of users but a fixed number of devices. This is ideal for shift works (ie hospitals) where users are coming and going.
You can mix the user and device style CALs in the same server.
This link form MS explains this model in server 2003:
http://www.microsoft.com/windowsserver2003/howtobuy/licensing/overview.mspxYou can always find a MS software specialist/dealer that can assist in the licensing.
Geoff