[Apologies if this is the wrong forum, or if this is a well-discussed trope, but searches are failing me ATM.]
Is there a setting or command-line switch to force authentication for access to ICS URLs? Our deployment is small and private, and there's no need for unauthenticated access to, e.g., https://zimbra.noiseplant.com/servic...t.com/calendar. This is Zimbra Community 7.2.0_GA_2669.
Happy to catch references to places this is already covered, if you'd rather not repeat what's already been said on the subject.