Normally this is not grayed out but on this windows server 2003 it is:
It results in disconnected sessions being terminated after 1 minute.
Can I set this in the registry to "never terminate disconnected sessions"?
(The dropdown box was disabled after installing and uninstalling some 3rd party software, I have no hope of fixing the dialog)
Solution:
See also: http://www.sevenforums.com/tutorials/118889-remote-desktop-set-time-limit-idle-sessions.html
Start the Group Policy Editor:
c:\> gpedit.msc
From http://technet.microsoft.com/en-us/library/cc754272.aspx :
You can also configure timeout and reconnection settings by applying the following Group Policy settings:
Set time limit for disconnected sessions
Set time limit for active but idle Remote Desktop Services sessions
Set time limit for active Remote Desktop Services sessions
Terminate session when time limits are reached
These Group Policy settings are located in the following locations:
Computer Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Session Time Limits
User Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Session Time Limits
These Group Policy settings can be configured by using either the Local Group Policy Editor or the Group Policy Management Console (GPMC).
These Group Policy settings will take precedence over the settings configured in Remote Desktop Session Host Configuration. If both the Computer Configuration and the User Configuration policy settings are configured, the Computer Configuration policy settings take precedence.
Best Answer
If the setting is unavailable on the properties of the RDP protocol then it's being set via Group Policy. You'll need to check the GPO's that apply to the server in question and configure the setting there.