This how to may help.

How to set time limit for disconencted session
Select Administrative Templates>Windows Components>Terminal
Services>Sessions. Right-click on Set time limit for disconnected sessions.
Select Properties. ...
http://www.howtonetworking.com/cases...timelimit1.htm


--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"PoB" <Pob@lackof.org> wrote in message
news:g15voq$cmk$1@scotsman.ed.ac.uk...
> Hi,
>
> We have an XP machine set up with software that has a single license
> (actually we have several, but most are fine). The machine is not
> accessible to users, they have to use Remote Desktop to get to it. Hey -
> it's cheaper than license managing software, and mac and unix folk can get
> to it to.
>
> One one particular machine, the remote desktop session won't release after
> the user has logged out - anyone trying to access the machine gets "you do
> not have permission to access that session". Admin users can log in no
> problems - no warnings "xxx is logged", nothing, but again after they log
> out, unprivileged users still can't access the remote machine.
>
> The machine requires to be rebooted before other folk can access it, which
> given that there is no "restart" option when you log out from RDC means I
> have to actually earn my keep and restart it myself - the horror....and it
> means that folk working out of hours send me a pile of peevish e-mails I
> have to attend to in the morning....more horror...
>
> Any vague ideas of where I should be looking at to fix this wee niggle?
>
> Many thanks
>
> Eddie
>
>