I'll bump this, because Mr. Bokovoy mentioned here ->
https://www.redhat.com/archives/freeipa-users/2016-December/msg00199.html that
the "slapi-nis plugin does not support paged results control for the
virtual subtree." and elaborated that they were working on rebasing it to
another 389-ds instance on the back end. Compat ALMOST works for vCenter
6.5, but without the paged lookup, it dies. Any idea when this change might
occur?