Before you start slapd, edit /etc/openldap/slapd.conf to include the location to store the data and details on who is allowed to access the data.
Change the suffix.
Change the rootDN.
Use slappasswd to generate rootpw.
Add rootpw entry.
Use the following commands to configure slapd for startup:
database (use default) suffix "dc=xxxxxx,dc=org" rootdn "cn=xxxx,dc=xxxxxx,dc=org" rootpw {SSHA}c5PemO1KWqz0254r4rnFVmxKA/evs4Hu directory /var/lib/ldap allow bind_v2 pidfile /var/run/slapd.pid