Created by Jerry Wang on Jul 10, 2014

Suppose you need to test Middleware function in EHP4 test system QD3/504, and you didn't know what is its corresponding ERP system. You could use tcode SMOEAC to find this information.

In its initial screen, click display button:

 

Expand node R/3, then you could find the RFC destination of leading ERP system. 

 

 

Most of the time the RFC destination name is meaningful, so you could assume that the system is QI3/504.

  

Anyway you could use tcode SM59 and search this destination name QI3CLNT504:

 

So that you could double confirm about the client id of QI3: