NetSuite Connector Carrier Handling
NetSuite Connector derives the carrier value from the name of the shipment method on the item fulfillment. For example, if the shipping method is called FedEx 2 Day, NetSuite Connector derives the carrier value as FedEx. However, for generic shipment methods from which NetSuite Connector cannot derive the carrier, usually NetSuite Connector sends the shipment method as the carrier. If you have multiple generic shipment method names or uncommon regional carriers, you must create mappings for the Carrier field or use the custom Carrier field.
When you sync orders to a 3PL for fulfillment, you can map shipment methods coming from 3PL to a different shipment method in NetSuite. However, make sure the shipment method mapped in NetSuite uses the same carrier as the one used with the shipment methods in the 3PL.