Setup calendar and contacts from Bitrix24

We use bitrix24 which has it so own contacts and calendar. I try to get them setup in eM Client.
I created 2 caldav accounts, one for calendar one for contacts.The setup in em Client gave no error, the login, psw and URL was accepted.

The server address (URL )that bitrix24 gives me is this: https://intranet.mydomain.com
eM Support tells me the URL is wrong. But this is the same URL I use in other apps like my apple calendar and contacts and there it works without a problem.

I can get from bitrix24 also this url for my personal calendar, but that did not work either when I used it as server address.
https://intranet.mydomain.com/company/personal/user/13/calendar/?action=export&type=user&owner=13&ncc=1&user=13&sec_id=11&sign=4e1dcab5e570cebed53e58497b645b62&bx_hit_hash=X0z9Ars6crY7qabZneJ2f6KifRFnmbZc

Does anybody know now to solve this problem?

In both calendar and contacts, nothing shows up.

I go the answer. Use this URL: https://mydomain.com/bitrix/groupdav.php/

Then they show up.