Manage Windows Server 2003 Active Directory tree system

Our company has three separate Windows Server 2003 trees spanning three states. We have recently used a multiprotocol tag switched virtual private network (MPLS VPN) tunnel to bring two remote sites to our corporate site. My ultimate goal is to manage the network like a tree (forest) and to have two remote sites as a subdomain of the company. I know it's easy to do this by deleting the Active Directory on these two sites and then joining the corporate domain as a subdomain, but you still need to re-establish the user account and access all the machines to add them back to the new domain. I know there will be other ways, please tell me, thank you.

I would suggest that you focus on the Active Directory Migration Tool (Active Directory Migration Tool), which can be downloaded for free at a subsequent URL: http://www.microsoft.com/downloads/ Details.aspx? Familyid=788975b1-5849-4707-9817-8c9773c25c6c&displaylang=en.

This tool will allow you to reconstruct or consolidate the Active Directory tree system that you describe, including migrating computer accounts and user account passwords. There are, of course, third-party tools from NetIQ and quest companies.