Since vCenter Orchestrator 4.1 OpenLDAP is not listed in the vCO configuration LDAP tab drop down directory services list.

To enable it back:

  • Edit vmo.properties in C:\Program Files\VMware\Orchestrator\app-server\server\vmo\conf
  • Add this line: ch.dunes.config.enable-unsupported-ldap-providers=true

Please note that this is an unsupported configuration - Do not do this on production servers !