use strict;  # Always a good idea

 my $mesg = $ldap -> search(filter => "(cn=Domain Users)",   # Take out the & , since the filter has only ONE entity
                         base => "dc=domain,dc=local",
                         sizelimit=> 9999,                # Try adding this
                         scope => "subtree" );            # Try adding this
 die $mesg->error if $mesg->code; # Always error-check
 foreach my $entry ($mesg->entries) {
	$entry->dump;
 }  

##</code><code>##

   filter => "(&(objectCategory=group)(cn=Domain Users))",