Hello Kumar, You'll need to, essentially, focus on the steps 4 and 5 in the above mentioned doc by Leo, -- assuming you have the same root cert/ cert-chain. (I believe the server cert it mentions is the LDAP server public cert that you need to enter into the PS cert db.) Also, make sure to flush the PS cache and LDAP server cache (or restart the LDAP server).
Rgds.- Vijay