DAVx⁵ has been successfully tested with EDIS.

EDIS is a (web) server and infrastructure hoster focusing on providing specialized technology to customers.

DAVx⁵ settings

Base URL: http(s)://dav.edis.at

User name and password: Use the same email address and password which you use in the webmail login.

Contact group method: groups are per-contact categories. Synchronization of groups only works in one direction: server → DAVx⁵. Groups created on Android are being discarded.