Mediated connectivity for SAP Ariba Cloud Integration Gateway (CIG) is an integration approach that uses a middleware platform to facilitate communication between SAP Ariba and the backend ERP system (like SAP S/4HANA or SAP ERP). In this setup, the endpoint URL configured within SAP Ariba must point to the entry point of this middleware. The two officially supported middleware solutions for this scenario are SAP Integration Suite (which includes Cloud Integration, formerly known as CPI) and SAP Process Integration/Process Orchestration (PI/PO). Therefore, the URL field must contain the specific endpoint address of the customer's SAP CPI tenant or their SAP PI/PO system.

A. URL of SAP system: This is incorrect because providing the direct URL of the SAP ERP or S/4HANA system is characteristic of direct connectivity, not mediated connectivity.

B. URL of Cloud Connector: This is incorrect as the Cloud Connector is a secure tunnel component. SAP Ariba sends data to the middleware (e.g., SAP CPI), which then might use the Cloud Connector to reach an on-premise system, but the Ariba endpoint URL itself points to the middleware, not the Cloud Connector.

1. SAP Help Portal | SAP Ariba Cloud Integration Gateway: Configuration for mediated connectivity. This document explicitly states

"For mediated connectivity

you must configure an end point to connect to the middleware. SAP Ariba Cloud Integration Gateway supports SAP Integration Suite and SAP Process Orchestration as middleware... In the URL field

enter the URL of your middleware system (SAP Integration Suite or SAP Process Orchestration)." (Accessed under SAP Ariba Cloud Integration Gateway > Configuring SAP Ariba Cloud Integration Gateway).

2. SAP Help Portal | SAP Ariba Cloud Integration Gateway: How to configure connection to SAP Ariba Cloud Integration Gateway. In the section detailing endpoint configuration

the guide specifies that for mediated connectivity

the URL should be the "URL for your middleware system". This reinforces that the connection target is the middleware

not the final ERP system or a connectivity component like the Cloud Connector. (Accessed under SAP Ariba Cloud Integration Gateway > Administration and configuration).