We're using SEB at the University of Cologne on virtual disks, used by Citrix Provisioning Services. Currently 150 computers are used for online exams and if there is the need to change something in the configuration shortly before or during the online exam, all computers have to be shut down. It would be very cool if there would be a option to use a shared configuration on a network drive. To secure the configuration file (i.e. hotkeys to leave seb, allowed applications), only the exam url, who changes every semester, should be in a special configuration file. At the moment our only option is to symlink the configuration file, but then smarter students could figure out the where the configuration file is located on. If there is only the exam url stored, it would be negligible.