You want to determine if replication is succeeding.
The following two commands will help identify problems with replication on a source domain controller:
> dcdiag /test:replications > repadmin /showrepl /errorsonly
For a more detailed report, you can use the Replication Monitor (replmon.exe). The Generate Status Report option will produce a lengthy report of site topology, replication information, and provide details on any errors encountered. The Directory Service event log can also be an invaluable source of replication and KCC problems.
12.8.4 See Also
Recipe 12.2 for viewing the replication status of several domain controllers