We have in place a 2003 Server environment, which consists of the following,
" 3 separate physical sites connected with T1s
" 1 forest, 3 separate Domains, abc.com, def.com, xyz.com (disjointed domains)
" 2 Domain controllers at each site (2003 Server) (AD,DHCP, DNS, WINS)for a total of 6 DCs
" Each site has approximately 250-300 Users.
" Each Site it IT staffed
" Move to MPLS between the 3 sites
" Upgrade our environment from 2003 Server to 2008
" Combine 1 forest/3 domains to 1 forest/ 1 domain (Starting fresh)
With the advances that are included with 2008 Server I'm not 100% clear on the best path for this migration. Would there be any use for Read-Only Servers in this solution or would each site continue to maintain 2 Domain Controllers? What would be the best viable solution for the scenario also taking into consideration for fail over between sites.