OpenLDAP 2.2.6 don't have this problem: adding new entry "cn=test,dc=komi,dc=mts,dc=ru" ldapadd: update failed: cn=test,dc=komi,dc=mts,dc=ru ldap_add: Object class violation (65) additional info: unrecognized objectClass 'abcd' and ldapadd: update failed: cn=test,dc=komi,dc=mts,dc=ru ldap_add: Undefined attribute type (17) additional info: x: attribute type undefined