Hello @Dhiraj,
You'll need to mention "ldaps://..." in the LDAP server URL. Along with that, you also need to make sure that the SSL certificate chain (containing the Root CA and intermediate CA [if any] certificates) of issuer of your LDAP server certificate are imported into the truststore of Ranger Admin server.
The truststore of Ranger Admin server, by default, could be JVM's truststore ($JAVA_HOME/jre/lib/security/cacerts). Or it could be a separate custom truststore.
Hope this helps !