I have a set of computers that is set to logout after 20 minutes for students. I've had to re-allocate some of those computers elsewhere, but am having trouble disabling the auto logout setting. I've disabled that setting in the jss, but I can't seem to remove it from the computer. If I go into system preferences/security/advanced, I can uncheck the option to auto-logout, but after I close system preferences and go back in, the box is checked again. I've created a managed preference to set the global preferences to disable auto-logout (with a value of 0), but that doesn't seem to make a difference. Any suggestions?