Recover admin password lost

Stop service

service slapd stop

Save ldap base

slapcat -n 2 > /root/slapcat.txt

Remove ldap base

mkdir /tmp/ldap.bak
mv /var/lib/ldap/* /tmp/ldap.bak/

Edit file

vim slapcat.txt
##=> change admin password

Import base

slapadd -l /root/slapcat.txt  -n 2

Set rights

chown -R openldap:openldap /var/lib/ldap/

Restart service

service slapd start