This requires [[#LDAP_Server_Side_Sorting_Control]]:
<pre> [5...]Client-Server Interaction This document defines a request The Virtual List View control which extends the a regular LDAP search Search operation operation. Always used in conjunction with the which MUST also include a server -side sorting control [SSS], this allows a client to retrieve selected portions of large search result set in a fashion suitable for the implementation of a virtual list view.
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A Perl example how to set a LDAP control: http://search.cpan.org/~marschap/perl-ldap-0.62/