You may have noticed that in 2013 the default group for “authenticated users” is no longer there. As you can see below, even typing it in, you get this lovely “No result found” message.
Well, have no fear, even though the UI won’t give you any assistance in the matter, all you have to do is the following:
- Enter ‘NT AUTHORITYAUTHENTICATED USERS’ into the username field
- Press the “Share” button
And voila, it works like magic! Don’t let the UI stop you from using this group – it’s still there, it just won’t help you get there.
Many thanks to Mark Priem and his original post: https://blogs.technet.com/b/mpriem/archive/2012/08/17/sharing-permissions-for-authenticated-users-in-sharepoint-2013-preview.aspx?Redirected=true