How can I put Windows Server 2008 into sleep mode?

"It is not enabled by default on Windows Server 2008, servers by nature aren't usually put to sleep like desktop machines, but it is easily enabled:


Click Start, click Control Panel, and then double-click Power Options.
Under the power plan that is configured, click Change plan
settings, and then click Change
advanced power settings.
Expand Sleep, and then modify the sleep configuration settings as
appropriate for your requirements.


Note: If Sleep does not appear on the Advanced Settings tab of the Power
Options dialog box, the computer does
not meet the requirements to support
the sleep feature. In this scenario,
you may have to update the drivers or
the devices on the computer.

Related MSKB article."