Specifies if transactions with the item should be blocked, for example, because the item is in quarantine.
You may choose to block the item if it is out of production; then it will not be possible to post to the item.
When you select the Blocked check box, it does not prevent the Whse. Item Journal or warehouse activities (pick, put-away, and movement) from using the item. You can still move items in the warehouse and register adjustments in the warehouse journals.
However, blocking does prevent you from creating a sales order line. In addition, a warehouse shipment for a sales order line that was created before the item is blocked can be picked but it cannot be shipped.