...when logged into a Server via remote Desktop?
I see no way to Access Windows security. In "old" 2008 R2 there was a "Windows Security" entry in the start menu when coming via RDP.
In the new Metro Start Menu, the username context menu allows me to lock the Computer or log out - but not Change the Password.
Yes, I can go through user Management, but this is not something I want people to do. ;)
Use
CTRL-ALT-END
to send aCTRL-ALT-DEL
to the remote system. That'll get you a 'Change a password' link.