We have just been informed by our Local Authority that they are going to change our internal IP range in our school. We currently run 500 XP workstations with 6 Windows 2003 servers. We also run Sharepoint WSS 3.0 on 2 servers, WSUS etc etc. Now obviously we will have to change our DHCP range, static addresses for printers, switchs etc but my concern is what effect will this have on DNS and domain controllers. I.E. what will happen to the 3 Domain controllers when I change the ip address of them and can I actually do this without major work. Any help would be most appreciated?