Troubleshooting “RPC server is unavailable” error, reported in failing AD replication scenario.

  In this scenario when are troubleshooting AD replication between 2 DCs separated by a firewall.       In order to ensure that the important well-known ports required in a domain environment are open on the firewall between these DCs, use the PortqryUI tool.   PortqryUI http://www.microsoft.com/downloads/details.aspx?FamilyID=8355e537-1ea6-4569-aabb-f248f4bd91d0&displaylang=en   Run this tool on both these DCs…

7