HCM to IDM Connection Problem

I' m working on connecting HCM (SAP ECC 6.0) with IDM (IDM 7.2) by

referring the document IDM for SAP System Landscape Configuration Guide.

I have done all the steps, everything rans fine up to the report that should transmit the data to the VDS and Identity Center (RPLDAP_EXTRACT_IDM).

I get the meaningful error message:

LDAP connection to Server LDAP_IDM_NEW could not be made

Message no. HRLDAP020

The LDAP connector, the RFC connection and the connection to the LDAP server are working just fine.

I can connect to the VDS with the communication user "hruser".

I also can find entries in the VDS. But in TA LDAP --> LogON--> Create I get the message: Authorizations are insufficient. My system user has write permission too!

I'm not 100% sure about some things:

RFC Destination: