This cool solution explains how to export the Trusted Root Certificate of the eDirectory Server, that is used for LDAP SSL authentications.
Later on, this certificate can be used for LDAP SSL authentication against the corresponding eDirectory server.
Disclaimer: As with everything else at NetIQ Cool Solutions, this content is definitely not supported by NetIQ, so Customer Support will not be able to help you if it has any adverse effect on your environment. It just worked for at least one person, and perhaps it will be useful for you too. Be sure to test in a non-production environment.