Ok, I solved it temporarily by using unencrypted http and port 5000.

Hi Kay,

I’ve exactly the same problem, but can still not solve it with your proposed URL (&export).
The Thunderbird and the Max OS links are working fine.
The Thunderbird link is as follows (server name replaced by localhost):

https://localhost:5001/caldav/micha/home/

So, I assume I have to use

https://localhost:5001/caldav/micha/home&export

But that doesn’t work.

So I varied the link with localhost, 127.0.0.1, my public dyndns address, with and without &export
Nothing helps.

Can you help me with that? Could https be a problem?

Best regards,
Michael