Android currently does not have any native applications that support CardDAV or CalDAV.
- atmail DAV server
Due to Android lack of native DAV functionality, atmail currently does not have a supported implementation on these devices.
However if you wish to try implement this using a third-party application, you will find the following URLs relevant.
- CalDAV: https://yourdomain.com:firstname.lastname@example.org/default/
- CardDAV: https://yourdomain.com:email@example.com