Do I have to use Quantity Available?
No, but FarApp believes using quantity available to be the best practice. Quantity available is the total number of inventory for a SKU that is currently available for use in filling new orders. The other common metric of quantity in NetSuite is quantity on-hand. Quantity on-hand is the total number of inventory that are physically located in a warehouse at the current time, but some of these may already be allocated for fulfilling current Sales Orders. For this reason, using quantity on-hand risks overselling. FarApp's interface is designed for using quantity available, so if you need to use quantity on-hand, you will need to contact FarApp to configure this.
Can different connectors sync quantity from different warehouses?
Yes you can. Quantity mappings can be tailored for individual connectors. This is useful if you are selling in multiple countries and want to avoid shipping internationally for items when you have them in stock in that particular country.
Can I have a negative quantity in a storefront?
Most storefronts do not support this so FarApp considers the best practice to be to post 0 quantity and/or mark an item out of stock as appropriate for a given storefront.