Fields that can be Mapped to and from ShipStation
By default, NetSuite Connector maps all the required fields when orders are synced from NetSuite to ShipStation. More mappings can be added to sync additional data to other fields in ShipStation, if the data is available in NetSuite, and ShipStation makes the relevant field available through the current API implementation that NetSuite Connector uses.
NetSuite Connector accesses ShipStation through the Custom Store API implementation that ShipStation offers. When the ShipStation connector was developed, this was the only API implementation that ShipStation provided. Although additional API implementation were later offered by ShipStation, the Custom Store method remains the method that NetSuite Connector uses.
Order and fulfillment fields in ShipStation are documented at https://help.shipstation.com/hc/en-us/articles/360025856192-Custom-Store-Development-Guide#UUID-1bb7ab47-6cf4-c6cd-0e5b-dec61e91201b_UUID-2be5b452-acd6-9a90-0a1b-bcc4109c85bd. These fields can be mapped by NetSuite Connector using the Custom Store API. If the field you want to map is not listed in the documentation, then it is not possible to map it to or from ShipStation.
Note that the fields are listed in the Custom Store Reference Guide Section of the documentation. Fields that can be sent to ShipStation are in the Order Information Field Definitions section. Fields that can be received from ShipStation are in the ShipNotify Field Definitions section. You must know which fields are header level fields and which fields are line level fields, as the source and target fields need to exist at the same level for mappings.
If you need NetSuite Connector to update a mapping or map to a specific field, review the list in the documentation to ensure that the field is available in ShipStation. Order fields can be mapped through the ShipStation connector user interface from Mappings > Orders. The shipment method on returning fulfillments to NetSuite can be mapped, but any other field will require a support ticket with NetSuite Connector to identify the ID of the field you want to map from ShipStation and the ID of the target field in NetSuite.
For more information, contact NetSuite Customer Support.