Often when working on a server or workstation via Remote Desktop you’ll need to restart it.“ The problem is that the “Reboot” option is glaringly missing from your remote session:
Fortunately there is a “trick” that will let you restart a machine.“ Press “CTRL-ALT-END” to bring up the “Windows Security” window (just like CRTL-ALT-DEL would locally).“ Click on the “Shut Down” button.
and then pick “Restart” from the drop down menu in the “Shut Down Windows” window, and click “OK”.
Your computer or server will be on it’s way to a fresh start.