https://bugs.openldap.org/show_bug.cgi?id=6083

--- Comment #6 from Howard Chu hyc@openldap.org --- (In reply to Heiko Zelt from comment #4)

PS: and I would like to check, if a password is compromised. I already have an external checker for this. It just needs an interface to OpenLDAP. Information about compromised passwords and it's importance can be found at https://haveibeenpwned.com/

To be clear - you should write your own pwdCheckModule that interfaces to whatever you want to talk to.