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?

Thanks!
Pat