We are using Intermec CN50 PDA devices with the standard Windows 6.1 build.
When we wipe the device to factory settings, set the pin lock to 15 minutes and configure the data connection, we are able to log onto a webpage and leave the device for as long as we want until we decide to unlock the device and continue to browse the internet.
However, when we connect the PDA using active sync to Exchange 2010 and sync the device. We then leave the PDA turned on, it stays connected but the device does not lock. If we manually lock the device and leave for 30 mins upwards the browser shuts down and has to be relaunched when the device is unlocked.
We have full control of the device and it's settings but the council manage the ICT infrastructure such as exchange and security policies. We are not sure whats causing this problem and if there was settings we could try.