We are working on scenario where PI 7.5 is the sender system & our PI system is on 7.4.
PI 7.5 [SOAP] --> PI 7.4 [our system] --> SAP ECC [Proxy]
Sender PI 7.5 system are getting error when they try to send message to our system.
We are using mapping in our PI system.
Channel configuration is mostly default options.
ICO config snippet.