For the ERP-initiated purchase requisition feature, two primary data flows must be configured via the Interface Setup program. The "ERP-initated Pur. Requistion" interface is essential for sending the purchase requisition document from the SAP ERP or S/4HANA system to the SAP Ariba solution. Subsequently, the "Procurement Response to ERP" interface is required to transmit status updates (e.g., approved, denied) and follow-on document information from SAP Ariba back to the ERP system. This ensures end-to-end process visibility and synchronization between the two systems.

B. Requisition Export Request: This interface is used for the reverse scenario, where a purchase requisition is created in SAP Ariba and then exported to an external ERP system.

D. ERP Response to Procurement: This is a generic response message from the ERP system and is not one of the two primary interfaces required to enable this specific business process.

1. SAP Ariba Cloud Integration Gateway Documentation: The official configuration guide explicitly lists the interfaces required for this scenario. In the section detailing the setup for purchase requisitions originating in the ERP

it states that "ERP-initated Pur. Requistion" and "Procurement Response to ERP" must be enabled.

Source: SAP Help Portal

"SAP Ariba Cloud Integration Gateway configuration guide".

Specific Section: "How to configure integration for purchase requisitions created in SAP ERP or SAP S/4HANA". This section details the procedural steps

including the selection of these two specific interfaces in the Interface Setup transaction.