If the stock of your branch also counts towards the available stock of your online shop, the available stock is checked as soon as you place an item in the shopping cart. If the available stock is already negative due to online orders or if there is an oversell due to the planned sale at the checkout, a warning message is displayed.
At this point you can decide whether you still want to sell the item or put it on hold for the open online orders.
If desired, this option can be deactivated via the plugin configuration.
Note: If the stock of your shop is only available for the shop and does not count towards the available stock of the online shop, no stock warning will be displayed.