Verify Whether Your System Cron is Completing Successfully
You can verify whether your system cron is running successfully from within the WHMCS Admin Area.
Log in to WHMCS Admin Area
Begin by logging in to the WHMCS Admin Area.
Review Automation Status
Go to Utilities > Automation Status (Setup > Automation Settings in WHMCS 7.10 and earlier).
The boxes at the top provide you with an overview of the status.