Sync to Outlook

Hello,
I have a short question regarding the sync to Outlook

In order to sync with Outlook, I have to use CalDav Syncronizer, though this APP is not working for me anymore.

Calendar is synced but NOT the Contacts. Any Idea on how to properly set it up? it used to work.

Or does anyone know an alternative?

Thank you

Here you will find the required setup steps: