Our tracking number comes from the shipment and populates in the E1EDK02-BELNR segment and is sent with our invoice IDOC.
Some of our plants use deliveries only and the tracking number comes from a different field in the delivery.
I want to implement the logic where it says if no shipment exists for the delivery then copy tracking number from delivery into the invoice IDOC.
I assume it will be a user exit but i want to know where and how will this userexit be triggered?
Will i need a new qualifier?
Please answer with details.