SUFFIX requires dc=us
The static dc value of 'us' in init.ldif does not work with any SUFFIX env var, including the supplied default, unless it begins with 'dc=us'. The dc value at the referenced location should probably be parsed from the supplied SUFFIX, or provided by way of another env var.
See: step 11 of the OpenLDAP Quickstart regarding <MY-DOMAIN>.
Edited by Jonathan Ciak