We get this question quite often on IRC or mailling lists, from newbies who’ve installed OpenDJ (or OpenDS) for evaluation and forgot the Directory Manager’s password.

So here are the steps :

Make sure OpenDJ is stopped.

bin/stop-ds

Generate an encoded password for Directory Manager :

bin/encode-password -s SSHA512 -c AS3cur3PassW0rd
Encoded Password:  "{SSHA512}G/knE0xkyW2Af3+1MFy+yPYxchGgLuqog71R4njPJcs9t5NDAadqLxU7pxZjZkrDquQeb5aq7tum1ZFC3uE+r4Nmuil4S46A"

Copy the string within quotes (without the quotes), and edit the config/config.ldif file.

Go down to the following entry

dn: cn=Directory Manager,cn=Root DNs,cn=config

Replace the value of userPassword with the newly generated one.

dn: cn=Directory Manager,cn=Root DNs,cn=config
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: top
objectClass: ds-cfg-root-dn-user
userpassword: {SSHA512}G/knE0xkyW2Af3+1MFy+yPYxchGgLuqog71R4njPJcs9t5NDAadqLxU7pxZjZkrDquQeb5aq7tum1ZFC3uE+r4Nmuil4S46A
...

You can now restart the server and administer it.