Hi Tom

For non enrolled students the non available course won't show in the category menu or the search.

For the calendar the course will be shown if you make the event a site event, if you make the event eg face to face  a course event the event will not show on non enrolled student's calendar.

I have tesetd on Totara 2.2.14 and this is how it works for me - is this the way it works for you?

Craig