Zimbra just as a calender
We are considering using Zimbra as a calender software, with requirements that it can be synced from ical, mobile phones and (less importantly) outlook. We allready have an open ldap implementation running, and would prefere to keep it external from Zimbra (and use it as authentication for the calender). We also have mail running externally, so it would not really be needed otherwise too.
Does this seem like a smart plan? After installing Zimbra it really looks like a swiss knife (out of which I would only need one tool)...