Hello everybody,
in the document
https://websmp103.sap-ag.de/~sapdownload/011000358700003477212005E/HowTo_IDOC_Ack_20040817RR.pdf
it is not explicitly emphasized whether the receiver system has to be a SAP system.
So my question: Has the receiving system (that send the acknowledgement back) to be a SAP system?
Regards Mario