How Can I Test AD Replication

Posted on 2009-02-18
Last Modified: 2012-05-06
What tests can I perform to ensure that AD replication between 2 sites is working properly? The sites each have DCs on them, and have site links, replication partners etc. setup and all SEEMS working.

I have performed a basic test of creating a user on each site and then forcing replication and checked each DC to ensure that the user created on remote site appears locally. This is working fine. A colleague told me that he remembers that there are 2 distinct parts of AD replication that should be tested - simple creation of user objects being one, but he can't remember the other one.

NTFRS and SYSVOL replication is working fine, and has been verified with REPLMON (I used this to confirm Group Policy Status on remote server to confirm a GPO created locally replicated out).

Thanks in advance :-)
Question by:Felicity_Harte
    LVL 58

    Expert Comment


    The two main parts you'd probably want to concentrate on are to test that the replication of the domain information directly from Active Directory's database. This can be tested using the creation of the user account and seeing it appear at the far end, as you have described.

    The second thing you need to ensure is replicating is your SYSVOL structure. You can make use of the NTFRS tools to test this, but again, the easiest way is probably to create something in the NETLOGON share on one of the DCs, and make sure that file replicates to NETLOGON on all the other DCs.

    Of course, there are tools out there which can confirm replication is running, but nothing beats a quick test by making a user or a file and testing it that way. :-)


    Author Comment

    Thanks for the quick response Matt

    I have already confirmed SYSVOL replication (i.e. NTFRS replication), and have also confirmed creation of objects is replicated (i.e. AD replication). I was told however that there is something else that I should test (in AD) to be 100% sure that replication between the 2 specific sites is working
    LVL 58

    Accepted Solution


    I can't think of anything else you'd need to test to see that replication is working correctly. If AD replication and NTFRS replication is working, that is pretty much everything you'd need. DNS and so on should be AD integrated anyway, so if your AD replication is working so will the replication of DNS data.

    Sorry, but I can't think of anything else it could be.


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