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We have two Windows NT 4 domain controllers at two different sites. These sites are connected to Mbps dedicated link. Each domain has PDC and BDC and serves as file servers, DHCP and WINS server. The servers have old hardware and can't be upgraded to Windows 2003. I want to restructure two domains and make it a single domain. We received two new servers for this purpose -- one server each at two locations (Domain Controller + Additional DC structure). How can I merge two Windows NT domains into one single Windows 2003 domain without effecting user permission on files? Which is good path, migration or upgrade?