since ios9 update cannot view calendar in Exchange OWA in safari
This is reproducible on any ios9 device in our Exchange 2013 organization. If a user opens the safari browser to our OWA page in order to view shared calendars, the calendars have no items on them.
We've cleared the safari cookies and history data and tried again, but no dice.
We do use Maas360 MDM and the native IOS applications, however the OWA website is the only way we have figured out to date how to view other people's calendars that are shared with you. We do know there is an OWA ios app, but it does not work with DUO multi factor authentication, so we just had the users use the built in iPhone browser.
We visit the same URL on a PC, and the calendars are fully populated. So the data is there in Exchange, but Safari in IOS9 is not rendering the event overlays on the calendar.
I have cross posted this to the Microsoft Exchange Server 2013 - Outlook, OWA, POP, and IMAP Clients forum to get a perspective from their side as well.
iPhone 6 Plus, iOS 8.4.1