I have installed root CA in a DC, port 636 and 3269 are listing in that DC. I have telnet the same port from client PC , that seems good and ldp.exe binding with those ports are working as expected. Wondering, I have not seen any event on client PC for LDAP SSL communication. Installed the Root CA with the help of the below URL http://www.isaserver.org/img/upl/vpnkitbeta2/installenterpriseca.htm ____________________________________________________________ DC: 2003 client xp/win7/vistaAliahMurfy