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Microsoft Resource Kits - Windows NT4 Resource Kit

Logoff.exe  (Windows NT4 Resource Kit)

The Window Server NT4 Resource Kit is a set of tools that NT domain administrators and engineers use to manage or support a Windows NT4 domain. Use it to streamline management tasks such as troubleshooting NT4 OS issues, managing an NT4 domain, and configuring networking/application services.
Logoff.exe
Utility (available only with NT 4.0 Server Resource Kit) allows the user to logoff from the command prompt.