Symantec Protection Engine sends a notification to the specified logging destinations when it reaches scan queued requests threshold. If your client uses ICAP, Symantec Protection Engine also rejects the scan request and sends a notification to the client. This feature lets the client determine load balancing and prevents the server from being overloaded with scan requests.
If you disable the client notification feature, Symantec Protection Engine continues to send messages to the specified logging destinations when the threshold is met. The "Log or send alert for maximum load every <n> minutes" setting applies only to SMTP alerts.
For logging to occur at maximum load, the logging level for the logging destination must be set to Warning or higher.