999 is the default value set for the available quantity field for each storefront. Ecomdash uses the lower of Quantity on Hand and Available Quantity.
- Quantity on hand would be the physical inventory count that you have in stock
- Available quantity is a feature that allows you to mask that number to a lower number on your sales channel.
*Inventory -> Inventory Management -> Click the Binocular icon to access the product details -> Click on storefront tab
*If you wish to NOT sync the value of available quantity, make sure the check box for 'Always Sync Available Quantity' is unchecked.