Hi people I am running 2 W2k8 R2 on Virtual machines, I am exercising on AD LDS replication. When opening the Active Directory Sites and Services MMC and binding to the second member server (and vise versa), and after typing the <FQDN:PortNumber> of the other server with the windows firewall ON the status of the Server is Unavailable. When turning the Windows Firewall OFF the connection is made and I can replicate normally. I am trying to find out what rule is blocking the binding on both directions. Thank you in advance for your precious help Cheers

Here's some common ports you may need open. http://technet.microsoft.com/en-us/library/dd772723(WS.10).aspx Regards, Dave Patrick .... Microsoft Certified Professional Microsoft MVP [Windows]