I can't find any menu otions to change the default timeout.
We have two computers installed with the guest management software, and on one computer it sets the correct timeout value set in the Account Profile (1200 secs), on the other computer it only sets it to 60 secs. I have compared all available configuration options in the Guest Management Client and they are exactly the same on both computers...
I will try to find the installation media and reinstall the management software and see if it helps...