There are group policies that may govern this, ie. idle session timeouts.
http://tinyurl.com/5l3tbt
Additionally look at this spread sheet that maps group policies to registry
settings.
http://www.microsoft.com/downloads/d...DisplayLang=en
--
Al Jarvi (MS-MVP Windows – Desktop User Experience)
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"MP" <MP@discussions.microsoft.com> wrote in message
news

39A48D8-E5AF-4E0D-859A-8E53C37827C0@microsoft.com...
>I use mstsc to connect from my laptop back to my office desktop. A recent
> change in our desktop image is now causing the desktop session to
> terminate
> all processes left running 15 minutes after I disconnect. My intent is to
> keep those processes running so I can reconnect to them later. This
> worked
> until the recent change in our standard windows image.
>
> Our windows install folks tell me there is a registry change in
> HKLM\System\CurrentControlSet\Control\Terminal
> Server\DefaultUserConfiguration that will fix this, but they can't say
> just
> exactly what the change should be. So far I haven't been able to find the
> right change to make.
>
> Any pointers to how to keep this idle disconnect from occuring will be
> greatly appreciated.
>