Outlook 2016 appointments not updating
Mac users must grant the "Reviewer" role to Outlook 2011 users.
Basic free/busy time viewing is only viewable via the Outlook 2011 Scheduling Assistant feature, or via OWA.
If you are making use of shared calendars in Outlook 2016 you may find that not all appointments are showing in the calendar or are disappearing.
I can add shared calendars fine, and most calendars work absolutely without an issue for calendars that have permissions set to User = Default, Role = Reviewer.But on some calendars where the Properties are set to User = Default, Role = Free/Busy, time, subject, location (i.e.the owner of the calendar doesn't want me to see the notes on the meeting), I can't see any appointments at all. When I use Outlook 2013 on Windows with the same account, I can see the calendar entries for that use just fine.The easiest way to verify this is the problem is to log in to your Outlook Web Mail, if you are using Office 365 you can log in at https://portal.using your username and password.
If a user sets permission levels only to allow free/busy or free/busy limited details, an Outlook 2011 user will not be able to see any details of the shared calendar.PC users must grant "full details" to the Outlook 2011 user.