Active Directory may not return all the values of an attribute, electing instead to provide the client with a range of attribute values. This practice is documented in an expired RFC: Incremental Retrieval of Multi-valued Properties. For instance, requests for the member attribute may return a result like: member;Range=0-1000. The client is then expected to request additional attribute values of the form member;Range=1001-2000 and so forth until all values have been retrieved. An EntryHandler is provided to handle this behavior.