Actually i have seen, that all my events i entered in Samsung Calendar App to my SabreDAV calendar, are allways synced with the state TENTATIVE. I fear the problem is with the calendar app from Samsung, but im not sure. If i use the Google Calendar App, the event can be set and synced with the state BUSY. But with this the problem is, that i can only set the state to BUSY or FREE. There is no TENTATIVE available.
Do you have any idea?