Stock Monitor automatically updates the quantity of available servers in the WHMCS product. Stock Monitor uses the regular stock control function of WHMCS.
To activate the function, you have to activate Stock Control in the product setting:
After activation, the module will automatically update the amount of available servers and keep it in sync. To confirm, click on "Activity Log" in the module menu.
To automatically hide or unhide products based on the quantify, open the module settings via "Addons" → "NOC-PS For WHMCS" → "Settings" and activate following options:
These settings are found at the bottom of the page, at the category "Other Options".