Active Directory Replication across Sites slow or not working

Posted by neildeadman on Server Fault See other posts from Server Fault or by neildeadman
Published on 2012-03-21T14:37:42Z Indexed on 2012/03/21 17:31 UTC
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I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites.

Site01 has 3 DCs & Site02 has 2 DCs.

If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though.

If I manually run the following command, everything syncs and the new user appears:

repadmin /syncall issdc01 /APed

In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately.

What can I check to resolve this issue? We are running Windows Server 2008

Results of dcdiag /test:dns show a server that is no longer part of our domain:

TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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