Hello, I have 4 DCs running windows 2008r2. We have two domains per site with a total of two sites. I've been seeing the following error messages for the last month or so in each of the DC event viewers under FRS:
Event ID 13562
Following is the summary of warnings and errors encountered by File Replication Service while polling the Domain Controller HDC1.corp.newstandard.com for FRS replica set configuration information.
The nTDSConnection object cn=1f196ff6-3ea7-49d3-84c8-f00fff4b06ef,cn=ntds settings,cn=hdc1,cn=servers,cn=default-first-site-name,cn=sites,cn=configuration,dc=corp,dc=newstandard,dc=com is conflicting with cn=1769bde3-568e-4d0f-87b8-f94659168877,cn=ntds settings,cn=hdc1,cn=servers,cn=default-first-site-name,cn=sites,cn=configuration,dc=corp,dc=newstandard,dc=com. Using cn=1f196ff6-3ea7-49d3-84c8-f00fff4b06ef,cn=ntds settings,cn=hdc1,cn=servers,cn=default-first-site-name,cn=sites,cn=configuration,dc=corp,dc=newstandard,dc=com
Event ID 13508
The File Replication Service is having trouble enabling replication from RMDC1 to HDC1 for c:\windows\sysvol\domain using the DNS name RMDC1.corp.newstandard.com. FRS will keep retrying.
Following are some of the reasons you would see this warning.
 FRS can not correctly resolve the DNS name RMDC1.corp.newstandard.com from this computer.
 FRS is not running on RMDC1.corp.newstandard.com.
 The topology information in the Active Directory Domain Services for this replica has not yet replicated to all the Domain Controllers.
This event log message will appear once per connection, After the problem is fixed you will see another event log message indicating that the connection has been established.
It appears that the DCs at either site are having trouble replicating to the remote site. DCdiags on the servers pass and they are all able to ping one another by FQDN etc. I do have IPv6 enabled on the DCs, but there is no address assigned to them and I've noticed PARTIAL SITE MAPPING events logged for them. I was going to disable the IPv6 on the LAN settings of the DCs, but I was told never to do this. I've also noticed that one of the DCs auto-created duplicate connections of itself under AD sites and Services on the two remote DCs. I deleted the duplicate ones.
I'm not sure what the issue could be as everything was working fine up until a month ago when I noticed the errors. I found a few KB articles that talke about using ADSI EDIT, but I'm not able to find the conflicting entries. Any help would be greatly appreciated.