Kerberos Server Version 3.12 Administrator's Guide

Configuring the Kerberos Server with LDAP
Setting up Your LDAP Configuration
Chapter 688
This line specifies the mandatory attributes of the default object
class.The object class attribute determines the attributes the entry
must have and can have. When the Kerberos server creates a default
object it uses the first attribute specified in this field, as the naming
attribute.
For example, uid. cn, homedirectory, gidnumber, uidnumber.