I have a win2003 server. And I will purchase CAL for my clients ( win98, win2k, win xp pro). My win2003 will bea domain controller. But I have also a server with win2000 server and this server I want to make also a domain controller ( like a BDC) in the same domain with win2003. My question is, what kind of licenses I need for Win 2000 server?. This server is used, for backup data and for backup domain controller.