Perhaps you’re creating a user for immediate use in another site. Perhaps you’ve updated a group membership and accidentally used a DC in the wrong site. Maybe you’re just lazy? One of the most fun (read: boring) parts of Active Directory cross-site administration is replication. Opening up Active Directory Sites & Services and mindlessly clicking Replicate Now gets painful, and begs the question of “how can I do this faster?”. Along came Polly…That is, if by Polly you mean repadmin.exe.
Repadmin is the hidden treasure of AD-DS replication. It allows you to replicate a connection simply by executing two simple commands:
repadmin /kcc MEL-DC01 MEL-DC02 SYD-DC01
repadmin /syncall /A /e MEL-DC01
This is easy enough, but when you have more than three or four Active Directory domain controllers it, again, feels slow. Along came PowerShell. In the script below I use Quest’s ActiveRoles Active Directory Management Snap-in to find all domain controllers in the current domain and then replicate the connections to/from them all.
Once we have a list of DCs, it is possible to loop through each then recalculate the replication topology and then replicate the connections. This performs the same task as clicking Replicate Now in
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