I am going to write this post for this issue as this is the second time when I am getting this error, Frist this error came when I promote a Windows Server 2008 Server to Additional Domain Controller and that time, File Replication Service was doing problem and was preventing Additional Domain Controller from replication with Primary Domain Controller and I applied below mentioned Solution for this to resolved the issue. Let’s start with issue and I am talking about below error;
Event Type: Warning Event Source: NtFrs
Event Category: None Event ID: 13508
Date: 6/14/2012 Time: 10:15:11 AM
User: N/A Computer: SATURN
The File Replication Service is having trouble enabling replication from VM-PK-DC1 to SATURN for c:\windows\sysvol\domain using the DNS name VM-PK-DC1.solexpert.blogspot.com. FRS will keep retrying.
Following are some of the reasons you would see this warning.
 FRS can not correctly resolve the DNS name VM-PK-DC1.ipaddresshost.local from this computer.
 FRS is not running on VM-PK-DC1..ipaddresshost.local
 The topology information in the Active Directory 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.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
1. Having gone through www.eventid.net & some other articles, I found that a registry tweak can solve this issue, Steps for registry tweaks are:
1) Stop File Replication service via Start - Run - type in CMD, click ok. In the Command Prompt window type 'net stop ntfrs' and press enter
2) Use RegEdit to edit "BurFlags" in the key "HKLM\System\CurrentControlSet\Services\Ntfrs\Parameters\Backup/Restore\Process at Startup"
* edit the dword key "BurFlags" in Hex format.
* Change from 0 to D2 or D4
D2 - Non-Authoritative restore (pull from another DC)
D4 - Authoritative restore
2. Start the File Replication service via Start > Run - type in CMD, click ok. In Command Prompt Windows type 'net start ntfrs' and Press Enter.
3. Check for Firewall (Windows / Router) between two Systems, you can disable firewall or can check that RPC traffic is able to communicate with the remote computer?
4. If Event ID 13509 is located in your System’s events logs than File Replication Service Restart,firewalls off / allow, DNS configuration, or Active Directory infrastructure is working or not can also help in this issue.
Hope this will help you to solve this issue..