emClient (natively), thunderbird (with plugin) also support caldav/cardav.
I remember there was a link in SM webui to display the links to the mailbox caldav/cardav but it seems it's gone in 17. Was it available in v16 or my memory is playing with me?
Additionnaly the domain autoconfigure could return the links in the autodiscover.xml, so client supporting these protocols could be autoconfigured.
For example mailcow, an open source mailserver which use SOGo for activesync/caldav/cardav has an autoconfigure that declare all these protocols and it works like a charm.
Could be a nice addition to SM to also have caldav/cardav autoconfigured.
Sébastien Riccio
System & Network Admin
https://swisscenter.com