Integrate Calendar & Contact Sync with Outlook



There is now a 3rdparty addon available for Outlook offering Calendar & Contact Sync with Outlook:

Install instructions are available here:

Within the app you can choose the "NextCloud" profile which will also work for ownCloud

Verwendung von owncloud-Kontakten für MS Word Serienbriefe

I can heartily recommend this, I've been using it for around a year now and it works flawlessly. It is being actively maintained and updates itself automatically.