I have found at least one answer to this problem! In Windows Server 2003 (only), there is a new group policy setting called Restrict Terminal Services Users to a Single Remote Session. In the Group Policy snap-in, it is located under (Local Computer Policy/Computer Configuration/Administrative Templates/Windows Components/Terminal Services). Set the state to Enabled, and people won’t be able to have two connections. So they will either reconnect to their session, or come complain for help. But you won’t be locked out![Darrell Norton’s Blog]
If the users just don’t understand the difference between Disconnect and Logoff, another useful policy is Remove Disconnect Option from Shut Down Dialog. Then the only way to disconnect is to close the Remote Desktop Window.� But doing that will popup a dialog box that tells the user the session will still be active.
Remote Desktop Tip from Darrell Norton
Alert - Archived Data
Please note that the old Network Blog content (from http://www.networkblog.net) is included for historic purposes only. Much of this data is either no longer relevant or may be missing from the original source. Most of this data was back from my MVP age and is over ten years old. Thus, many of the links are no longer valid as Microsoft has changed the links on many of their Technet sites.