I am working through a list of problems from the boss that he is having on his iPhone 3GS, iOS 4.2. Doing ok but stuck on this one!

We use Google Apps for the company email, calendars etc. At some point he has been able to accept an appointment directly when viewing the appointment in the Calendar app on his iPhone. Now he cannot though.

The phone was using CalDAV to sync with Google but I have changed this to the Exchange method so he can invite people from his iPhone's calendar. Still no accept/decline etc options back though.

What are we missing/doing wrong?

Thank you