I wanted the SSL Certificate of my LDAP Server which is Novell eDirectory. I have used openssl to connect to ldap to view the certificate.
openssl s_client
Or you can easily export the public and private key via iManager if you need them in either DER or PEM format. (DER is a binary format, PEM is a base64 encoded format, so in iManager, your choices will be DER or B64 and B64 ~= PEM in this context)