I have tried multiple versions of Apache Directory Studio - and there seems to be a problem with multi-valued RDNs.
For example I have entries like this in my LDAP (OpenDS):
DN: myAttribute1=val1 + myAttribute2=val2 + myAttribute3=val3, OU=example, DC=test
Note: I don't have a CN here, the RDN is solely defined by custom defined classes myAttribute1, myAttribute2 and myAttribute3.
In Apache Directory Studio, in the "LDAP Browser" window, I can not expand DNs like the one mentioned above. When I click on it and try to expand it, the whole tree collapses + re-opens again, showing "ou=example (1+)".
There's no way to show details / contents of such a DN!