Cannot replicate AD

One of my clients win2003 standerd bus. servers cannot replicate its Active Directory entries to other AD in the network. Each AD is in different geographical locations. While it appears that each server is a peer, the faulty server's AD is where a majority of the changes take place, and it worn't replacte to the other two servers. The other two servers are talking to each other fine. There are serveral solutions provided by the MS error event (sorry I don't have it handy) but basically should I demote the other two functional servers, and force the current entries on faulty server onto the other two servers? Aa far as users are concerned, the faulty server is the most up to date. Your thoughts is much appreciated

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I’m not sure what your knowledge level is, so here are a couple of things to start with.

Check AD sites and services. Make sure that each geographic location has a site, the ip subnet in that site is correct and that the location DC is under the server folder for each site.

Also take a look at this article, specifically info on repadmin, command line utilitly or look up info on replmon, a gui utility.
Both utilities are 2003 support tools that are located on the 2003 cd but you can download them from

Another possible issue could be a firewall blocking the replication ports. Here is a link to the ports AD uses

I would only demote/promote them again as a last ditch effort. Most likely the issue is a configuration issue that will not go away even if you tried this.

What errors are you getting in the logs??

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  • Stevesz
    Without the Event ID(s) and messages, it is a bit difficult to troubleshoot this sort of thing. First thing I'd look at is the connections to the other AD machines. Do you have connectivity from/to th emachine tha has the problem? Could the replication traffic be blocked by a firewall along the way? Things like that. Hopefully you have already done this.
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