It would be great if the caldav resource would support tasks as well. Right now I cannot access tasks on my communigate pro server. More Info about communigate pro caldav support here: http://www.stalker.com/cgatepro/WebDAV.html Reproducible: Always Steps to Reproduce: 1. add new akonadi dav resource with communigate pro server 2. 3. Actual Results: calendars show up - even multipe subscribed to calendars from other people (which is great - congrats!), but no tasks (which are stored in another subfolder/file).
If by tasks you mean todo list items then it should work out of the box. Do you know of any Communigate Pro demo server available for testing? If I have to install it it's gonna take some more time to troubleshoot this issue.
I am using tasks synchronisation under my ownCloud 4.5.x Server regularly. So the functionality is there. It is most likely something specific to your Communigate Server.