Integrate calendars other than Outlook/Google

[AJungstand]

I am looking for an integration (synchronization, not just import) of my Zoom calendar with other calendars. Ideally it would be a bi-directional synchronization via webdav. Does anyone have a solution for this. Background: Neither Google nor Outlook fulfill the necessary data protection requirements and couldn't be used.
Many thanks in advance

[jrmagno]

This may help - first is enabling bi -directional sync. https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0058782

and here is the list of integration compatibility to zoom.

https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0066581

[AJungstand]

Many thanks for your help and sorry for coming back so late.
Nevertheless it's not the solution I'm looking for. All the offered integrations don't fulfill the necessary data protection requirements. A webdav based solution would work, like many other calendars providing. For me the most important point is the integration in my mail client (Thunderbird) and/or my cloud services (Nextcloud).

Best regards, AJ