CALDAV calendar: certificate issue in local network

Hi @wwe

thank you so much – I’ll try to follow these steps during the next days.

By the way, do you (or someone else) know if this is a problem that is related to the FritzBox, or is it always necessary to set up a separate DNS server? I’m just wondering because in all online step-by-step instructions for setting up NC I’ve never seen that this was mentioned.