To be able to raise invoices (not a draft invoice) and apply payment for goods on back order, or pre-ordered goods. Especially useful for goods made to order where payment is needed upfront, or for customers to secure stock in advance of release.
Currently, you are unable to raise an invoice for goods where you have zero items in stock. The workaround using a draft invoice is too time-consuming and doesn't show on the customer's file.
You are also unable to keep track of the number of items on back order as it isn't logged with inventory management.
Quickbooks already has this feature and saves so much on admin time, it's a shame this isn't available on Sage.