LDAP DN parameter in attribute-resolver.xml IDPv4 file

[Peter Schober]

* Tommaso Gallo <gallo.tommaso at gmail.com> [2021-11-11 18:44]:
> having an LDAP server where all my users are registered, which works
> as an authentication system for my IDPv4, I would like to know how I
> can import the DN parameter in the "attribute-resolver.xml" file

Some (most?) LDAP server implementations provide access to the DN of
an object as an operational attribute, e.g. entryDN for OpenLDAP,
could be distinguishedName or dn in others.

But I believe the LDAP library used by the IDP these days (ldaptive)
provides such an attribute itself, independent from the LDAP server
implementation. Maybe 'distinguishedName' was the name of that?
I can't currently find this in the IDP v4 docs, though.

-peter