To see the instructions for activating the license on your server, refer to the service specifications page in our user panel, and by clicking on the your product, enter the information viewing section and see the installation guide.
Portal Home > Client Area > My Products & Services > Downloads
Installation Guide :
Note: The WHMCS license system can only be used on versions higher than 7.
download License.php file from in Product Detial > left sidebar > Download box
If WHMCS is installed:
To use the WHMCS licensing system, you must place License.php file in your WHMCS in the following path \vendor\whmcs\whmcs-foundation\lib
you can download your licesne.php file in service detail, also u can request it with contact to support
Then set the license key (YourLicenseKey) in the configuration.php file.