Hi Amir,
Adding to Hareesh's reply, please check the below link
Configuring the Receiver IDoc Adapter (SAP Library - SAP Exchange Infrastructure)
Restoring Original Partners for
Acknowledgments
If you set the
relevant indicator, the original partners from the IDoc request message are used
for acknowledgments. This means you no longer have to maintain the alternative
identifiers (for party conversion) in the Integration Directory.
Please also check the below discussion
regards,
Harish