This is a really weird one, hopefully someone can help. I need to access the calendars on two Office 365 accounts on my Nexus 7. When I connect to account A I see all calendar entries. Connecting to account B I can't see any calendar entries. Exactly the same when I test the calendars on my Nexus 4. My assumption at this point is that there is some sort of configuration difference between the accounts on Office 365. But now the odd bit. I connect to both accounts on my wife's iPhone. Exactly the same settings. And this time I can see all calendar entries on both accounts. Just in case I reset the Nexus to factory defaults and try again, with the same results. I'm stumped. Any ideas?