How to enable fast user switching when Login Options are disabled?

I'm not sure how this machine was setup, but I do have control over it now as a local admin.

I need to enable fast user switching, but the option is greyed out along with some others. This is after unlocking the changes padlock.

Is there anything I can do to reenable these options?

Solution 1:

This isn't a real fix, but I finally found a workaround. Even when fast user switching is disabled, you can still invoke this feature from the command line by running:

"/System/Library/CoreServices/Menu Extras/User.menu/Contents/Resources/CGSession" -suspend

This leaves your session running and goes back to the login screen.

I created an alias for this in my .bashrc, good enough for now.