I think the core schema is in use as it is in the /etc/ldap/slapd.d /cn=config cn=config.ldif /etc/ldap/slapd.d/cn=config cn=module{0}.ldif cn=schema.ldif olcDatabase={-1}frontend.ldif olcDatabase={0}config.ldif olcDatabase={1}mdb.ldif /etc/ldap/slapd.d/cn=config/cn=schema cn={0}core.ldif cn={1}cosine.ldif cn={2}nis.ldif cn={3}inetorgperson.ldif Thanks Bob H

Thanks Quanah I have how sorted it out. I just proceeded as the following: vim /tmp/schema_config.conf Below is the list of schemas I put in the file include /etc/ldap/schema/core.schema include /etc/ldap/schema/cosine.schema include /etc/ldap/schema/nis.schema include /etc/ldap/schema/inetorgperson.schema include /etc/ldap/schema/mozillaAbPersonAlpha.schema mkdir /tmp/toinclud slaptest -f /schema_config.conf -F /tmp/toinclud I edit the generated file vim / /tmp/toinclud/cn\=config/cn\=schema/cn\=\{4\}mozillaabpersonalpha.ldif I changed the three head lines to this: dn: cn=mozillaabpersonalpha,cn=schema,cn=config objectClass: olcSchemaConfig cn: mozillaabpersonalpha Deleted these lines from the bottom of the file structuralObjectClass: entryUUID: creatorsName: createTimestamp: entryCSN: modifiersName: modifyTimestamp: Inserted the new schema to the ldap tree with. ldapadd -Y EXTERNAL -H ldapi:/// -f //tmp/toinclud/cn\=config/cn\=schema/cn\=\{4\}mozillaabpersonalpha.ldif This maybe helpful to people having the same problem. Thanks Bob H