Now I tried the 1.12 (with an outlook.com account, it's the same issue with my companies exchange):
- First nothing changed, the exceptions still had a duration of 30 minutes
- I tried to sync the calendar completely new, so I unchecked the calendar sync for the exchange account and then rechecked it new in Aqua.
- Every event was new synced. First, everything was fine, but a few minutes later, I think about 10 minutes, the issue is here again, all exceptions only have a duration of 30 minutes.
- I tried an other calendar app (DigiCal) to view the events, there it's the same issue.
- One thing is interesting: In the normal google Calendar App, it shows only 30 minutes in the daily overview, but when I open the event, there you see the right beginning and end. When you open the item in DigiCal, there the Beginning and End Time is the same Time, both times e.g. 20:00 for all wrong elements.
- On the Server, everything is fine (in Outlook on the PC and on outlook.com on the webpage)