In cross-system transactions, the purchase order history of the purchase order is updated with the message type PO_UPDATEPOHISTORY when the unchecked delivery is converted to a delivery.

The delivery copies either the total confirmed quantity, or a partial quantity confirmed using the ATP check. The delivery then behaves as if you had reduced the quantity manually.

When changes are made to quantities and delivery dates, the system updates the purchase order and, where required, triggers a new delivery of the remaining quantity.

When a delivery is deleted, the purchase order decides whether a new unchecked delivery should be created.