Hi Harish,
We are looking for an Acknowledgement from PI layer, to reflect PI message translation status back to SYSTAT01 IDOC. what if we have an error in PI mapping? How we will replicate it back to IDOC status?
MDN usually comes from target system when we have the AS2 based messaging.
Anyways we have plan to update the functional ack back from target system/partners back to original IDOC with status 15/16.
Cheers,
Rakesh