Thanks Jitendra for your reply,
2. How your are getting data for your PO MBO in your post as even you have mapped it with sap backend
I didn't get it properly.
Based on input parameter, i am getting the PO details. I have 3 load arguments in this MBO and mapped it to Propogate to attribute.
For this, I mean,when your calling PO MBO An RFC associated with the MBO get called at back end and gave you the response but to execute that BAPI/FRC you should have a valid credentials those will execute that RFC at the back end.
how those credentials are getting passed?. Even I am using the admin configuration and my admin configuration has NoSecLogin module and PreConfiguredLogin module provider added.