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How to Add a new domain in an offshore office to an existing Windows 2003 Active Directory?

We have a WIndows 2003 Active Directory with single domain (Domain A) in North America. Domain A has two Windows 2003 Domain Controllers and one of DC has DNS, DHCP, Global Catalog and FSMO on it. The subnet is (Network A) We have a firewall with VPN for this network.

We will build a brand new domain (Domain B, Netowork B in an offshore in Asia with a new Windows 2003 domain controller. We will install DNS/Wins/DHCP on this new domain controller and let it act role of FSMO and Global Catalog.  A new firewall with VPN will be setup on this network.

We'd like setup site-to-site VPN connection between headoffice (Network A) and offshore office (Nework B). We will also want to allow users in Domain B have access to Domain A and certain folders on file servers among two neworks can be replicated automatically.

How can we add this new Domain B to an existing Windows 2003 Active Directory? How can we realize it?


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2 Solutions
Point the network properties DNS settings to the current AD DNS.  Make sure your connectivity is good.  When you run dcpromo, join the existing forest.
What you need, once your vpn is up, is to create a forest trust between the two domains, this will alow access through.
That is if you are choosing to go a multiple domain environment...

I would also advise using conditional forwarding for DNS so that requests for each domain are sent to the right place

Much better off adding an additional DC though in the remote site and configuring AD sites and services

DNS Server in each site, GC in each site, and away you go, replicating central AD

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