Receiver XI Adapter - Dynamic username & password

Hi,

I have a SOAP2ABAPProxy scenario.

I need to logon on ERP back-end system by specific users, not by a technical user.

For this reason, I do not have to configure the receiver XI channel with a fixed RFC destination connecting PO (nw 74) with ERP, but I want to set logon data (username and password) dynamically (for example using data in payload).

Any suggestion to achive this?

Thanks in advance.

Giovanni.