Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows

1. Stop the Terminal Services Session Directory service.
2. In the registry, locate the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tssdis\Parameters
3. If the Parameters key does not exist, create it.
4. Add the following DWORD value:
TraceOutputMode
5. Select the option you want:
* 0 (no output)
* 1 (output to debugger)
* 3 (output to log file)
6. Start the Terminal Services Session Directory service. If you selected option 3 in step 5, Terminal Service Session Directory places the output in a log file that is named Tssdis.log in the System32 folder.

The Terminal Services Session directory log file contains the following entries:

* Session Directory service started
* Session Directory service stopped
* Machine joins session directory
* Machine leaves session directory
* User logs in
* User disconnects
* User reconnects
* User logs out
* Session Directory-related event log messages.

Important If you stop and then restart the Terminal Services Session Directory service, you clear all Terminal Services Session Directory data. Do this only if it is not a problem to do so.