Good news for people who are looking to sync their CalDAV calendars (like the one from OwnCloud server) with MS Outlook: there is finally an opensource plugin that actually works 🙂

I have tested this with MS Outlook 2010 and OwnCloud server 8.1.1, and so far it just works, giving you full 2-way sync.

 
More info here:

 
Download:

Update (08-Sep-2015), version 1.1.0 is already out:

 
And this is wat ik looks like (account settings):
 
CalDAV sync
 
Enjoy 🙂