Is it possible with to sync Outlook 2016 with CalDAV and CardDAV servers? I want to use Google Calendar and Google Contacts as well as OwnCloud. So far I'm afraid there is no "vanilla" way to sync contacts or calendar events (in both directions) without third-party plugins.
If you want to sync CalDAV and CardDAV servers you will probably the free Outlook CalDav Synchronizer downloadable at the link below: https://sourceforge.net/projects/outlookcaldavsynchronizer/
Yes, you can use EVO Collaborator for Outlook (paid). I have personally confirmed that it works pretty well with Google and OwnCloud. (or NextCloud)