Configure the System Cron JobConfigure the system cron job as part of the WHMCS installation process and make certain that its daily automation tasks always run successfully.
Configure When Daily Tasks RunCustomize the time at which the system cron job runs and how often the system invokes it. The cron job must run at least once per day in order to complete the daily automation tasks.
Find the Cron php.ini FileIf more than one php.ini file exists, make sure to identify the php.ini file that your system uses when it executes the system cron job.
Resolve a Cron PHP MismatchIf the php.ini file that runs the system cron and your system use different PHP versions, you will need to adjust your configuration.
Schedule a Service TerminationSchedule a service to terminate at the end of the current billing period. When you do this, the system will cancel any unpaid invoices.