I have built a Windows 2003 Active Directory and use DHCP for allocated addresses to my clients. I have authorised the DHCP into the Active Domain and Dynamic DNS is working well. However, within our building/ network we have a number of departments who are administered by a different I.T Department and who use static IP addresses for their workstations. I am finding that my DHCP Server is automatically allocating IP addresses to some of these clients where they have put their PC/ laptop on the network but left the IP settings to be automatically assigned. Is there any way I can get my DHCP Server to only assign IP addresses to machines that are members of my domain only?