This illustration shows the Alerts section of the Notification subtab. In this section you can check the following checkbox:
Enable Alerts, to be sent to the administrator. If this box is checked, you can then check either or both of the following checkboxes, to cause alerts to be sent to the administrator, using the other related information that you enter here:
Pending Requests Queue over Threshold, which alerts the administrator when the number of certificate requests exceeds the queue size specified here, in the entry box labeled Queue Size Threshold.
Queue Size Threshold
Queue Size Check Start Time: indicate the elapsed time in hours and minutes before the start of the first check
Interval Between Queue Size Checks: enter the days, hours, and minutes between such checks
Enable CRL Auto Generation Failure. Checking this box causes the administrator to be notified that automatic generation of the CRL has failed.