Here’s how I synchronised contacts from my email client (eM Client) with contacts on the Murena workspace. Perhaps this may be useful to someone (I searched in vain for how to do this on the forum and in the documentation).
The URL of the CalDav/CardDav server to be used can be found in the Murena workspace, like this:
Contacts > Contacts Settings > Address books > Contacts : click on the 3 dots and “Copy link”, you get something like:
https://murena.io/remote.php/dav/addressbooks/users/UserName/contacts/
In eM Client:
Accounts… > Add account > Contacts > CardDav:
in the Account address field (CalDav/CardDav server information) put the above URL (without contacts/), your user name and password.
eM Client will then create a new Contacts folder to contain the contacts to be synchronised.
Unfortunately, it is only possible to put contacts in the Contacts folder, not folders containing contacts. Does anyone know if this is standard or a limitation of Murena?