Child domain replication question

Posted on 2011-10-25
Last Modified: 2012-05-12
Hi, I've started work at a company that has an AD forst with 4 child domains within that forest.

I've not come across child domains before, and I was wondering about replication.

In AD sites it shows the child domains DCs replicating with the forest root DCs. I thought that each domain would only replicate with DCs within its own domain?

If I look in DNS, DNS servers in each child domain list zones for other child domains, and each zone shows AD integrated and replication to all DNS servers in the AD forest.

So does each DC in the child domain replicate only the DNS data to other DCs in the whole forest, and not user/computer objects?

Question by:paulo999
    LVL 10

    Assisted Solution

    I thought that each domain would only replicate with DCs within its own domain?

    Are you having multiple trees in the forest?

    LVL 39

    Accepted Solution

    Domain Controller replicate data (Active Directory Partitions) between other Domain Controllers in a domain and in a forest.
    Some of them are only replicated within a particular domain and some within forest to other domains.

    Please check that:

    Domain partition is replicated only between DCs within this particuklar domain. There are stored users/computers/groups objects. So, if it's only replicated within particular domain, it cannot replicate those objects to other domains in a forest

    Configuration and Schema partitions are forest wide replicated to all DCs in whole forest. But there are no users/computers/groups objects

    For more about Domain Partition, please read this MS article at

    For DNS zone replication, please review these MS articles. They describe this process better than I would do that

    LVL 8

    Assisted Solution

    by:Amitabh Singh
    Hi paulo999
    simple  terms of Domain controls are fallowing

    Domain controller and additional domain controller :
    will replicate all AD object and DNS information in full Domain .

    child domain controller: CDC is a sub domain or other word you can called as branch office of Domain , its have own AD partition (it miens it will not replicate user,computer and shared folder etc object with domain  )

    Example :  you have a Domain called and a sub domain called uk, now in this scenario if you create a new user on it will not visible in and same with both server will have separate AD partition

    note: on both domain you will have separate administrator account but member of Enterprise Administrator group will have access to DC and CDC both network and he able to change any thing like administrator !

    Author Closing Comment

    Thanks for the info. That's how I thought it worked but I wanted some clarification
    LVL 39

    Expert Comment

    by:Krzysztof Pytko
    You're welcome :)


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