The RADIUS schema and Samba schema for PEAP authentication must be included into the slapd.conf file. After modifying the file, the LDAP server must be restarted to load the new schemas.
cp /usr/share/doc/freeradius-1.0.1/RADIUS-LDAPv3.schema /etc/openldap/schema/
cp /usr/share/doc/samba-3.0.10/LDAP/samba.schema /etc/openldap/schema
include/etc/openldap/schema/RADIUS-LDAPv3.schema include/etc/openldap/schema/samba.schema