First problem:
With zimbra desktop I use a local calendar that is not synchronised with the webcalendar. I use it for private events and it is only visible on my PC. But when I create new events, even if I chose to include them in my local calendar, they are created in the professional web calendar.

Second problem:
In my webcalendar, I have set events in a private status as a default option. But some of my events are automatically set as public (no lock icon). If I try to modify it, it is already signaled as private (although it's not).

Thank you for any helping reply !