Currently about 1.5Mio.
If you have access to the system and have mdb_stat available, the easiest method is to simply query the database directly:
mdb_stat -s id2e /path/to/mdb/db | grep Entries Entries: 3993833 --Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>