After installing the Zarafa-Client for Outlook I was able to access to my Mailbox and Calendar, but if I create a new Task, this isn't displayed in the Web-Frontend.
Also if I create a task in the Web-Frontend but it is not shown in Outlook.
I tried the same in Thunderbird, and I got the same behavior.
For Thunderbird I found a solution. I added a second Calendar with this url: http://
So I have to add two calendars to sync Calendar and Tasks. I don´t know if this should be done this way, because I thought, that if I add a Calendar with http://
<ip>:<port>/cladav all should be shown in Thunderbird.
Maybe I configured something wrong.