Hi - I'm starting the evaluation of Zimbra as a replacement for MS Exchange. One of the features that I know it supports is the ability to be a CalDAV server to various clients including Macs, Thunderbird (Lightning), and Sunbird. But what I can't figure out is how to include a CalDAV calendar within Zimbra's own web client. Am I missing something or isn't this supported? How do you add CalDAV calendars which are external to the Zimbra server?

Is this something that's going to be included in release 6?