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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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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

3 Answers 3

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.

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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
up vote 1 down vote accepted

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.

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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

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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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