Microsoft, Microsoft Windows Server, Windows 2003 R2, Active Directory and behind ISA server 2006 firewall, There are warning or error events within the last 24 hours after the SYSVOL has been shared

I have two Server, Server 1 is my Active Directory and Server 2 is my additional  domain controller with ISA Serverr 2006 installed, here the Error

(There are warning or error events within the last 24 hours after the SYSVOL has been shared. Failing SYSVOL replication may cause Group policy problem.)

The File Replication Service is having trouble enabling replication from ISA_SERVER to SNCLI_SERVER for c:\windows\sysvol\domain using the DNS name isa_server.sncli.com. FRS will keep retrying.
 Following are some of the reasons you would see this warning.
 
 [1] FRS can not correctly resolve the DNS name isa_server.sncli.com from this computer.
 [2] FRS is not running on isa_server.sncli.com.
 [3] 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.

raulmondaAsked:
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Stephen MandersonSoftware EngineerCommented:
You shouldnt be running ISA on a DC it should be installed on its own machine. One of the main reasons for this is security.. :) And thats whats causing the issues for you just now ISA has locked down the server and as such replication cannot occur. The admin share on ISA is inaccessable ie \\Servername\Admin$ . I would personally recommend having ISA on its own.
Regards
Steve
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raulmondaAuthor Commented:
But according to some expert the ISA server should be member of the domain controller. If I do this solution to separate my ISA server I need to removed from my AD the ISA server.
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Stephen MandersonSoftware EngineerCommented:
ISA can be run as a domain member yes by all means, but as a domain controller no it shouldnt (Except in the case of SBS in which it was designed to do).
Regards
Steve
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