I am one of the "Experts" here but I don't have a good answer to this and I need to seek some more suggestions. At my work I have the Corporate location in one city and 5 other plants at 5 other cities. We currently use Linux and are in the process of moving over to Active Directory using Windows Server 2008 R2. I wanted to use a Parent / Child domain structure and use City.Domain.com as the child domain and Domain.com as the Corporate location. Each location has a different IP scheme 10.XX.0.0 and the XX changes per plant. One of the main problems that I have is that we are using Custom written software and it is using the same server names at each location on a flat network. So each fileserver points to 10.(local XX).1.1 but I am having an issue of getting Fileserver.Domain.com to let me point it differently at each plant while trying to set up AD. I have issues with that since the Active Directory replicates between the main location to the sites. Thanks everyone.