Make "Lock" the default selection on Ctrl-alt-del screen
When you are logged on to Server 2016 core console, and press ctrl-alt-del, the default selection is now "change a password". Obviously it should be "Lock" that is the most used selection (like it is already on Server 2016 Desktop Experience). The goal is not to fiddle with arrow keys, but to just press ctrl-alt-del + enter to lock the server screen.
Windows + L