This question is about how to use KDE and KAddressbook, specifically, with Nextcloud contacts.
I was able to integrate my NC contacts into KDE (KAddressbook, Akonadi) via CardDAV. I see all my individual contacts and they are properly synced both ways.
However, contact groups do not work. How do I get them to work?
I can create contact groups in Nextcloud via the web UI, but those groups do not appear in KAddressbook. I cannot create contact groups in KAddressbook, the button is greyed out.
Has anybody figured out how to do it? Or does KDE simply lack the support?
I assume it might have to do something with the fact, that there are actually two different approaches how contact groups are represented in CardDAV: a) groups are categories of contacts b) groups are independent CardDAV entries. I know that NC takes approach a) and on Android the DAV5x connector provides a setting to choose which method the server uses. I haven’t found any related setting in KDE. Hence, chances are that KDE is hard-coded to approach b) and that it simply does not work, but maybe (hopefully) someone proves me wrong.