I have some ICS files that are generated by my existing calendar system that seem to import just fine into Zimbra, however, after the import, the appointments cannot be edited. They also show up in the calendar as darker color shade than an appointment created IN Zimbra. For example, An appointment created IN zimbra works fine and is a light blue, the imported appointment is read-only and is a dark-blue. I can delete them, but that's about it. Is this expected behavior?
Update: Ok, the color-shade I figure out (needs to be accepted), however, it is still read-only.