I've got a Windows 2000 AD environment that needs to be transitioned straight to 2008. In addition, Exchange 2003 is also present and needs to be transitioned to 2010. Can anyone advise on the correct order of operations for this and also of major caveats if any? Here are a few details:
-Primary physical site: PDC (+DHCP, DNS) and (1) BDC (+DNS) and 1 File/Print Server (+WINS)
-Handful of WAN linked physical sites each with (1) site-linked 2000 BDC (+DHCP)
-All Exchange 2003 roles are on one server at the primary site, with no RPC/HTTP access - external access is OWA only
My first consideration is to transition Exchange, then AD. I understand that Exchange 2003 will not run on a domain-functional level of 2008. Can I transition the DCs and leave the functional level at 2000, until the Exchange transition is complete? We may want to leave Exchange 2003 in co-existence for a month or longer to simplify client reconfigurations (many employees are on extended leave).
Another concern is the transition of BDCs at other phsyical sites. Would I complete all work at the primary site, then transition each other controller, making sure to leave the functional level at 2000? I am concerned with the changes to replication topology. As the other sites transition, will they pickup all necessary parameters automatically to continue receiving replication from the newly transitioned primary site ? Any major pitfalls to note ?
Please advise on the best order of operations to complete this, with the significant element of Exchange 2003 needing to be left in co-existence for an extended period. Thanks.