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 172.20.0.0/255.255.0.0. (Network A) We have a firewall with VPN for this network.
We will build a brand new domain (Domain B, Netowork B 192.168.2.0/255.255.255.0) 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?