The quantity ordered, should be same as on Sales Order, if not, that Sales Order has probably been modified in the ERP.
{ "id": 0, "deliveryNoteId": 0, "lineNumber": 0, "partNo": "string", "externalPartNo": "string", "productName": "string", "stockUnitOfMeasurementCount": 0, "priceUnitOfMeasurementCount": 0, "qtyOrdered": 0, "quantity": 0, "qtyBackOrdered": 0, "isPartDelivery": true, "salesRepContactId": 0, "vatRate": 0, "valueMst": 0, "noteText": "string", "department": "string", "centre": "string", "transId": 0, "created": "2019-08-24T14:15:22Z", "createdBy": 0, "updated": "2019-08-24T14:15:22Z", "updatedBy": 0, "orderItemId": 0, "purchaseOrderItemId": 0, "lineNumberString": "string", "clientId": 0, "deliveryNote": { "id": 0, "clientId": 0, "noteNo": "string", "supplierId": 0, "typeId": 0, "referenceOrderId": 0, "buyerCompanyId": 0, "buyerCompanyCode": "string", "buyerCustomerId": 0, "buyerCustomerCode": "string", "payerCompanyId": 0, "payerCompanyCode": "string", "payerCustomerId": 0, "payerCustomerCode": "string", "resellerCompanyId": 0, "resellerCompanyCode": "string", "resellerCustomerId": 0, "resellerCustomerCode": "string", "groupCode": "string", "deliveryName": "string", "deliveryAttention": "string", "deliveryCareOf": "string", "deliveryAddressLine1": "string", "deliveryAddressLine2": "string", "deliveryZipCode": "string", "deliveryCity": "string", "deliveryRegion": "string", "deliveryCountryId": 0, "deliveryDate": "2019-08-24T14:15:22Z", "quantity": 0, "volume": 0, "weight": 0, "isPrinted": true, "deliveryTerms": "string", "deliveryMode": "string", "source": "string", "deliveryMark": "string", "noteText": "string", "department": "string", "centre": "string", "shippingNo": "string", "created": "2019-08-24T14:15:22Z", "createdBy": 0, "updated": "2019-08-24T14:15:22Z", "updatedBy": 0, "deliveryAddressId": 0, "divisionCode": "string", "statusId": 0, "isForgotten": true, "forgottenBy": 0, "forgottenDate": "2019-08-24T14:15:22Z", "deliveryAddress": { … }, "items": [ … ], "packages": [ … ], "referenceOrder": { … } }, "orderItem": { "id": 0, "orderId": 0, "lineNumber": 0, "parentLineNumber": 0, "statusId": 0, "partNo": "string", "externalPartNo": "string", "productName": "string", "stockUnitOfMeasurementCount": 0, "priceUnitOfMeasurementCount": 0, "warehouseId": 0, "locationId": 0, "qtyOrdered": 0, "currencyId": 0, "vatRate": 0, "costUnit": 0, "priceSale": 0, "discountPercentage": 0, "discountAmount": 0, "lineAmount": 0, "deliveryMode": "string", "isPartDelivery": true, "expectedDeliveryDate": "2019-08-24T14:15:22Z", "confirmedDeliveryDate": "2019-08-24T14:15:22Z", "salesRepContactId": 0, "ledgerAccount": "string", "department": "string", "centre": "string", "transId": 0, "externalStatusText": "string", "created": "2019-08-24T14:15:22Z", "createdBy": 0, "updated": "2019-08-24T14:15:22Z", "updatedBy": 0, "lineNumberString": "string", "priceRecommended": 0, "priceCatalog": 0, "priceStandard": 0, "clientId": 0, "deliveryNoteItem": [ … ], "invoiceItem": [ … ], "order": { … }, "infos": [ … ] } }