One way AD replication

Question

I need to set up a test environment within an existing AD infrastructure. I want my test DC to replicate data from other domain controllers but never to sync any changes with the remaining servers. I will be testing some GPOs and they may mess up my domain
if they replicate to the AD. 
Does any one know a way to do it? I will be modifying some general GPOs and a separate GP OU will not allow me to test all the solutions I want to.

Answer 1

Greetings!
What are you trying to accomplish exactly?
You can disable Outbound\Inbound replication traffic on a particular DC using commands but GPO's are completely different story. Replicating active directory objects is responsibility of Active Directory replication but GPO replication is responsibility
of DFS or FRS on earlier editions.
Which one you are aiming for?
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How to query members of 'Local Administrators' group in all computers?
Well I would just like to add that GPOs are stored both in AD (The GP Object) and in the SYSVOL (The GP Template) a GPO would not apply to the client if it can't read the GPO off AD, hence it has know knowledge that the GPO exists.
In general:
Playing with disable/enable replication isn't a god way to test out GPOs - filtering the scope of the GPO using a Security Group that contains test computers/users and/or creating a test OU would be more sufficient. 
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Christoffer Andersson – Principal Advisor
http://blogs.chrisse.se - Directory Services Blog