iCal uses the WebDAV protocol to publish your calendar to the server. However, WebDAV is not supported on our servers.In order to publish your calendar, you can use the iCal FTP application. It is available at https://download.cnet.com/iCal-FTP/3000-2124_4-26973.html. iCal FTP does not require the server to support WebDAV, and it will allow you to publish your calendars to your website via FTP.