This tab is available if the reservation of items had been done for the customer order.
The Customer Order (create) from. The Reserved Inventory tab
The tab contains a list of inventory items reserved in specific warehouses for this customer order.
Click the Show Reservation Details check box to show information on reservation documents.
You can cancel the inventory reservation for the customer order by creating an Inventory Reserve (Cancellation) document. For this, click Generate > Inventory Reserve (Cancel) on the toolbar. For details, refer to Canceling the Inventory Reservation.
Alternatively, you can cancel the reservation from the appropriate Inventory Reserve document, which you can open in the list: Warehouse > Warehouse Documents > Inventory Reserves.