DAVx⁵
EGroupware is an Open Source software for business use and provides the services which allow organisations to collaborate in a secure and function rich environment, supporting integrated project teams across and within organisation boundaries.
CalDAV/CardDAV setup
Base URL: /groupdav.php (e.g. https://example.com/egroupware/groupdav.php)
Ccontact group method: No contact group support. Choose "per-contact categories" as contact group method to minimize problems.
WebDAV setup
You can mount folders from of your eGroupware files manager using the DAVx⁵ WebDAV mounts feature.
WebDAV URL: https://{domain}.egroupware.net/egw/webdav.php
User name: your eGroupware email address or username
Password: your password