3686680 - External number range issue in Purchase Order creation via PurchaseOrderRequest_In in SAP S/4HANA

When creating Purchase Orders with the SOA service PurchaseOrderRequest_In the external number range assignment is ignored or leads to errors. 

• SAP S4HANA all versions

external number range, purchase order, BAPI_PO_CREATE1, SAP S/4HANA, internal number range, OLME number range, SOA class, CL_MMPUR_SOA_PO_IN, external reference ID, MEPO logic, API integration, SOAP message, influence request, SAP products, API_PURCHASEORDER_2  , KBA , MM-PUR-GF-ES , Enterprise Services in Purchasing , MM-PUR-PO-BAPI , BAPIs - Purchase order , MM-PUR-PO , Purchase Orders , MM-PUR-PO-API , OData APIs - Purchase Order , Problem