Hello community,
I've created this document once I was dealing with many hard investigations trying to figure out what was failing / causing issues in a case where application integration involves also connection to application that resides on SAP backend system - In this case portal act as a frontend and many variables are involved. So once you have Solution Manager installed, it will help you a lot in this kind of investigation.
1608474 - How to create/record an end-to-end trace for root cause analysis
Thanks,
Edison Büttenbender