Backorder Disallowed tells you the backorder operation you are attempting is blocked.

For example, on an Item Adjustment you may have a B/O Checkbox that doesn't work. It could the entry predates the Backorder function or it just might not be a component.

Backorder adds custom features to back order Components on Builds and later update.

Recurring brings together tools to Memorize and Recall and then fully automates them.

Backorder Component lets you click the B/O Checkbox to remove from the Built item.

Backorder QuickFind puts the Show pulldown on Item Adjustments to help you find.

From a Build you may need to find an Order or its Invoices to manage the backorders. From an Auto-Build you might want to find its Invoice.

Using a Credit is a simple process to help keep customer accounts current and correct.

Issuing a credit is done by entering a return invoice with a negative quantity and saving.

Invoicing is the next step in using a credit. You need something to apply the credit to.

Applying is the final step to using a credit. Create a Payment and click Auto-Apply.

Requisition was a custom feature for creating entries which become Purchase Orders.