Client Probing Settings
Select this option to enable WMI probing.
Probe Interval (min)
Enter the probe interval in minutes (range is 1-1440; default is 20). This is the interval between when the firewall finishes processing the last request and when it starts the next request.
In large deployments, it is important to set the interval properly to allow time to probe each client that the user mapping process identified. Example, if you have 6,000 users and an interval of 10 minutes, it would require 10 WMI requests per second from each client.
If the probe request load is high, the observed delay between requests might significantly exceed the interval you specify.