Note sharing is not available to basic users.
Just noticed that my personal test server has just upgraded to 2.1.1 and this is now the home screen. So it looks like the share options (Note / Notebook) are actually in the process of being separated?
At the moment the admin's "Users" page still only has "Can share" as an option.
That's strange, I was sure that note sharing was always enabled, so the "yes" in that table is actually hard coded, but I guess it's not. I'll have a look and re-enable it by default.