active directory

I have one AD domain , I want to create a duplicate copy of current domain controller as I am creating a new DC

Can I replicate data from old dc server to new dc server in same domain. if yes how-should I copy ntds.dit file from old server or any other windows method

I don't want any changes to be made in new dc replicated to old dc , which I will be keeping for some time. though they are in same domain only ip wil be different.
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Cliff GaliherCommented:
You can't do that at you want. DC replication is core functionality. Trying to stop changes on the new DC from replicating to the old DC will simply corrupt your AD database.
It is not clear what you are actually trying to do.

You could do an image backup of the DC which would satisfy your requirements of "duplicate copy" and "don't want any changes to be made..." but I don't think that is really what you want.

Can you give us further details on what you are actually trying to accomplish?

Why don't you want the changes on the new DC replicated to the old one?  Will they both be active on the same network?
pramod1Author Commented:
we are working in one AD domain. we are trying to build new DC and copy data from old dc which is running on windows server 2003.

new dc will be on 2012.

but both will be in same datacentre. my question is :

how replication will take place from old dc to new dc? can we do system state back up and restore it on new dc

or is there any method like robocopy to copy data.
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Cliff GaliherCommented:
DCs replicate between each other if they are healthy. No need to copy or make special adjustments. Just promote the new DC and it'll get all of the 2003 active directory data automatically.
If you configure the Server 2012 box to be a DC on the same domain, the AD information will propagate automatically (as Cliff stated).  Do NOT do the system state backup and restore!

This does NOT get the data copied over.  I have always done this manually.  It is typically a good time to re-evaluate the organization of data and sharing.  If not, just look in Computer Management, Shares to see what all is shared and by whom.  This is a good time to ensure that shares are (generally) done by groups and not by users.

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pramod1Author Commented:
so what will propogate ? and how the data will be copied, u mean user accounts, computer accounts , or we have to transfer manually schema , PDC, Infrastructure master??
pramod1Author Commented:
Do we need to create subnets in AD site as both are in same AD domain , once we build the new DC , do we need to go to AD sites and services for replication will the old server show up
Cliff GaliherCommented:
You should probably get someone familiar with Active Directory to work with you on this project. These are fairly complex concepts and the questions you are asking show that you aren't ready to tackle this yourself, and are too intricate to properly get answers in short forum responses like EE offers.
I agree with Cliff that this takes more than a short answer here.  There are numerous Server 2003 to 2012 guides online.  Here's one example:

I've not used that one so I can't recommend it specifically.

Simple answers (though there should be even more questions!) is that the users, groups, and rights will propagate over, but not files.  You shouldn't need to do any special subnetting.

What will happen to your 2003 server when the transition is completed?  Consider keeping it as another DC.
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