I’ve been in IT for several years now and for some reason I never knew this tool existed in Windows.
In the past I’ve used things like Sysinternal’s PSShutdown to remotely reboot or shut down a PC.
I found today that if you enter “Shutdown -i” at a command prompt you get a shutdown tool you can use to reboot or shutdown other PCs on the network.
I tried this on Windows Server 2003, Server 2008 and Windows 7 and it worked on all of them.
If you hold down shift when you right click on the command prompt icon and select “Run as a different user” you can launch it as a domain administrator.