The current LdapGroupProvider can only “talk” to static groups (e.g., groupofuniquenames) with member fields (e.g., uniqueMember).
But what about dynamic groups (e.g., groupOfURLs) with member fields that are ldap search strings (e.g., memberURL)? Has anyone gotten those working? Perhaps written their own LdapGroupProvider? Adding this kind of support would make this a powerful LDAP integration.