This field is on the posting screen of the Purchasing and Receiving window, and only displays if the following two conditions are met:
You have set option 3047 "Use item level PO Backorder flag in Purchasing & Receiving" to Yes.
You press Flip (* on the keypad) to display the expanded view of the PO posting screen, so that the Backorder (BkOrd) field displays.
When adding an item to the PO, this field defaults to the value from the PO Backorder field in Inventory Maintenance. You can change this field if desired.
Blank = This item is backordered per the P.O. Header's Backorder field (default)
Y = This item is backordered if it is not received
N = This item is cancelled if it is not received