The Backorder edit mode will only be available if the Ship To customer has items on backorder.

 

If backorder items do exist for the ship to customer, entrée will default to the Backorder edit mode, allowing you to fill any backorders that you have stock for.

 

All backorder items for the ship to customer will be loaded in the item grid.

 

In order for a customer to have items placed on backorder, they must have the Track Backorders option enabled. (Located on the Miscellaneous tab of Customer File Maintenance)

 

The backorder edit mode is not available when creating or changing Credit Memos.