Use the following steps to achieve this:
- Navigate to the Fulfillment section and click the Field Mappings option against the NetSuite Fulfillment to eBay Shipment Add flow.
- Click on the Settings for Ship Method to ShippingCarrierUsed mapping.
- Set up a Static Lookup. Enter the respective Shipping Carriers under the Export Field (values from NetSuite) and Import Field (values on eBay).
- Also, select appropriate default Option at the bottom.
- Save the mapping and also Save the mappings page after that.