<p>Google's surprise announcement on March 13 that it is shutting down its CalDAV application programming interface (API) seemingly isn't going to set back Microsoft's plans to incorporate support for Google's calendar syncing protocol.</p><p>At the end of January 2013, Microsoft and Google came to a last-minute agreement to extend Google's support of Google Sync, which is built on Microsoft's Exchange ActiveSync, until July 31 -- instead of terminating it by the end of January, 2013, as previously announced. In the interim, Microsoft would build support into the Windows Phone operating system for CalDAV and CardDAV, the Google calendar and contacts sync protocols, the companies announced.</p><p>Yesterday, however, Google announced CalDAV was being discontinued on September 16, 2013, with the Google Calendar API becoming the CalDAV replacement. However, according to Google's blog post on the topic, some unnamed "whitelisted" developers would be able to continue to use CalDAV.</p><p>Google's CalDAV page already lists the API as being "deprecated." A note on the page adds "If you think you have a compelling use case and would like to be whitelisted for the new version of CalDAV API, please fill out this form."</p><p><a href="http://www.zdnet.com/microsoft-in-the-clear-to-add-google-caldav-support-to-windows-phone-7000012633/">Keep reading...</a></p>