Dynamic Reference descriptor for Ldap References. Used to setup a dynamic reference with a set of attributes instead
 of an url (dynamicAttributeId).
 
 - filter: Attribut that contains the filter, example "msExchDynamicDLFilter"
 
 - type: subtree/one
 
 - baseDN: Attribut that contains the BaseDN used for search, example "msExchDynamicDLBaseDN"