Hi Elisa, Have you downloaded and imported ESR object XI7_1_ARIBA_ONDEMAND_PURCHASEORDER_12s2_of_ariba.com.tpz into SAP PI?
Once you imported, perform the steps mentioned in chapter 4 in the below mentioned guide.
I think you are referring different version of the guide. Please refer the guide available here
1) Go to https://connect.ariba.com/AC_Home_Page/
2) In the home page, Product Summary menu, choose On-Demand solution, there you can find Ariba Procure to Pay. Click on "Ariba Procure to Pay".
3)In the opened page, there is a chapter called Product documentation. Click on the topic "Ariba Procure-To-Pay User and Administration Documentation"
4)You can find 3 tabs: Go to Administration tab. In that, you find the chapter ERP Integration.
5)Refer the document "Ariba Procurement Solution Integration Guide for SAP" under the chapter "Integration with SAP".
Thanks,
Kanda