You want to specify the frequency with which the ProxySG appliance checks for a new version of the central policy file.
First, configure the remote URL for the policy file:
Next, set a new update interval in the command line interface (CLI):
Note: By default, the appliance checks for an updated central policy file once every 24 hours (1440 minutes).
#(config) policy poll-interval minutes
where minutes is the numeric value used as poll-interval.