Claymoore wrote: » Once you deploy a 2008 domain controller, you can use group policy preferences. You will need to use a Vista or Windows 7 workstation to edit the GP Preferences, and you will need to deploy the Client Side Extensions to XP or 2003 machines for them to process the policies. Here is an overview of the domain and forest functional level features:Understanding AD DS Functional Levels Restartable AD is a server 2008 feature that is independent of the functional level:AD DS: Restartable Active Directory Domain Services If you are upgrading your existing domain controllers to 2008 or will be introducing 2008 into a 2003 domain, you will need to migrate from FRS replication to DFS:SYSVOL Replication Migration Guide: FRS to DFS ReplicationThe Storage Team at Microsoft - File Cabinet Blog : SYSVOL Migration Series: Part 1 ? Introduction to the SYSVOL migration process