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]

  • Which version of Window server are you running? – Cold T Mar 21 '12 at 14:43
  • Windows Server 2008 64-bit (mix of Enterprise/Standard) – neildeadman Mar 21 '12 at 14:45
  • Post DCDIAG results. You probably have DNS issues. – Vick Vega Mar 21 '12 at 15:26
  • Was that oldserver a DC or only domain member? – Dusan Bajic Mar 22 '12 at 14:48
  • I'm not sure as it was before my time, but I suspect it was a DC (although not in AD) as file servers here tend to be DCs too – neildeadman Mar 22 '12 at 14:50

We have set the DEFAULTIPSITELINK to 15 minutes for the replication time.

Local DCs replicate instantly... across different sites, it depends on this replication time.

Change this to 15minutes, create a new users, it will replicate instantly across local DCs, wait 15 minutes, it will replicate across different sites.

  • How is this timed? Does it do it every 15 minutes? Or does it do it 15 minutes after a change? – neildeadman Mar 22 '12 at 14:01
  • The sites are replicated every 15 minutes, if you click on 'Change Schedule' you can see when it replicates. – Cold T Mar 22 '12 at 14:40

In AD Sites & Services, for the IP transport, I made a server at each site a preferred bridgehead server for that transport.

This added a new "automatically generated" connection for each of those servers.

Replication now occurs within around 30 seconds, even with the replication time set to 180 minutes.

  • Can you set DEFAULTIPSITELINK Option back to 0 and see what happens? I believe this option setting overrides replication time setting. – Dusan Bajic Mar 23 '12 at 10:19

See if this helps: Right click DEFAULTIPSITELINK, Properties, Attribute Editor, set Options to 0x1

  • I've set that and made another new user, but this hasn't replicated either – neildeadman Mar 21 '12 at 15:09
  • check again in few minutes please – Dusan Bajic Mar 21 '12 at 15:13
  • Still not replicating.... – neildeadman Mar 22 '12 at 14:00
  • now wait. Did your sites replicate, ever? (before adding this option) – Dusan Bajic Mar 22 '12 at 14:46
  • Yes they did. It seems it was only after the 180 minutes wait. Want it to be a few seconds, rather than minutes though – neildeadman Mar 22 '12 at 14:49

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