3722233 - Unable to Use API_PURCHASEORDER_2 for POST or PATCH of Partner in Purchase Order

It is not possible to create or update a Purchase Order using API API_PURCHASEORDER_2 when partner functions are included in the request payload.

The system returns error "Method not allowed" and the Purchase Order is not created or updated successfully.

• SAP S/4HANA
• OData APIs - Purchase Order

purchase order, API_PURCHASEORDER_2, partner function, partner role, supplier partner, GS partner function, OData API, POST, PATCH, HTTP 405, purchase order creation failure, purchase order processing, SAP S/4HANA, sourcing and procurement, Fiori apps, not supported , KBA , MM-PUR-PO-API , OData APIs - Purchase Order , Problem