<p>Exchange 2013 has built-in features that allow end users to share calendars with internal usersand engage in external collaborations using several methods, including forest trusts and federatedsharing. But the simplest way is to enable Exchange's built-in, standards-compliantcalendar-sharing feature. This tip explains how to enable the calendar-sharing feature and publishit securely to the Internet.</p><p>The feature for sharing Exchange 2013calendars with external users is called Anonymous sharing. This doesn't mean that calendarsfor end users will be exposed for anonymous users to browse. It means that when an end user shareshis calendar with someone outside the organization, an encoded URL will generate that cannot beguessed, but it doesn't require a username and password to access.</p><p>To enable Anonymous Calendar Sharing, open the ExchangeAdministration Center and navigate to Organization &gt; Sharing. In the IndividualSharing section, edit the Default Sharing Policy (Figure 1).</p><p>Choose Add to add a new domain to the Default Sharing Policy.</p><p><a href="http://searchexchange.techtarget.com/tip/How-to-share-calendars-in-Exchange-2013">Keep reading...</a></p>