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AD Replication Failure.

Posted on 2004-04-20
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Last Modified: 2010-04-13
Background –
      I have 2 servers – server (DC) and server2 (Member). Initially server was setup as an AD DC running all apps and services. Recently I have added server2 for load balancing and in hopes of running Exchange 2000 on it. After joining server2 to the domain and verifying AD, DHCP and DNS replication I proceeded to install Exchange 2000 on server2. After running /forestprep and /domainprep the installation completed with success

Problem –
After reboot replication errors started to occur and now replication fails with
Error Id 1265 - The DSA operation is unable to proceed because of a DNS lookup failure.

No Exchange information is replicating to PDC AD.

I have seen this posted before and the resolution was to promote server2 to PDC and then demote. Is there any other fix out there?

All services are running.
Yes I’ve tried the White Papers suggestions.

This is what I get with NlTest

Nltest /dsgetdc: /pdc /force /avoidself
DsGetDcName failed: Status = 1355 0x54b ERROR_NO_SUCH_DOMAIN

Please help me Obi-One.........
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Question by:matalyn1016
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LVL 16

Expert Comment

by:JamesDS
ID: 10866984
matalyn1016
This is DNS - it usually is!

Make sure your AD Server and your Exchange server are pointing to the same INTERNAL DNS server and that there is a forward lookup zone on your DNS Server that allows dynamic updates for your internal AD domain (IE domain.local)

then run the following at the command line for each server:

IPCONFIG /FLUSHDNS
IPCONFIG /REGISTERDNS

This will return the missing _MSDCS entries for each server and allow them to resolve each other.

Cheers

JamesDS
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Author Comment

by:matalyn1016
ID: 10874493
I agree it a DNS issue.

I have tried all of the basics including the suggestion above and am still receiving Error ID: 1265 errors in my event viewer. Is there a way to reconcile replication errors. I have used repadmin and repmon, when I try to create manual site link between the servers it fails. I’m totally at a loss. I am willing to allow a terminal server connection to a verified, certified Expert so they can review the situation. Any takers? I will gladly add points if needed.
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Accepted Solution

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JamesDS earned 250 total points
ID: 10875400
matalyn1016

If the servers are in the same subnet, they should also be in the same site - at least while we sort this out.
I'll have a look at your TS if wish, see my profile for information on how to verify and contact me.
Cheers

JamesDS

0
 

Expert Comment

by:cutelilcomputergeek
ID: 10998185
Hi guys...i am having the exact same issue matalyn1016 is having...is there any way you guys could let me in on what the resolution was to this??

Thank you very much.
Hannah
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LVL 16

Expert Comment

by:JamesDS
ID: 11002738
Hannah

The problem was eventually due to configuration of DNS on the Domain Controllers to look externally. This means that they weren't registering their own records in the internal DNS and therefore could not resolve each other.

The correct way to configure DNS for AD is to have everything point to an internally hosted DNS and then have the DNS server(s) perform any forwarding to the ISP DNS servers.

I have put this explanation in to assist the rest of the EE community. If this does not solve your specific problem then please post a new question and allow other experts to comment.

Cheers

JamesDS
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