Change Kolab Directory Manager password (CentOS 7)

stop dirsrv@kolab :

# systemtctl stop dirsrv@kolab

generate a new password:

# pwdhash newpassword

edit /etc/dirsrv/slapd-kolab and change the line :

nsslapd-rootpw: {SSHA}sMenoLEtsTWzdvplg0dfAy1a+DnOaHe0D8a1yQ==

and replace the {SHA}... bit with the password you generated with pwdhash:

nsslapd-rootpw: {SSHA}qeeho8tNY7saCBF+ugdljuweDfeMTZIn2sq1CA==

restart the directory service:

# systemctl start dirsrv@kolab

UPDATE:
I found out to my cost, that the Directory Manager password is stored (in plaintext, FFS) in another, very important file ; /etc/kolab/kolab.conf

So find this snippet and change the plaintext password :

# vi /etc/kolab/kolab.conf

...
[ldap]
ldap_uri = ldap://localhost:389
supported_controls = 0,2,3
base_dn = dc=blogger,dc=com
bind_dn = cn=Directory Manager
bind_pw = newpasswordhere
...