Hi Experts,
I have a scenario where 3rd party system sends the data to SAP CPI and SAP CPI returns the response back.
For inbound HTTP certificate-based connection, its is mentioned in the SAP blogs to install CPI root certificate in senders keystore so that load balancer certificates will be trusted.

My question is why sender has to trust the load balancer root certificate? Here sender is sending the data to SAP CPI and SAP CPI load balancer will check the sender's signed certificate (CA supported by LB) So, LB only checks sender CA signed certificate then why sender has to trust the load balancer certificate? where it will be verified and in which step?
Client Certificate Based Authentication for HTTPS/IDOC Inbound Connection in SAP CPI | SAP Blogs

Please clarify my doubts.