6. Multiple Logouts
When signing into Word for iPad for the first time using our Office 365 account, we were happy to discover that we didn't have to perform similar sign-ins when initially launching the iPad versions of Excel and PowerPoint. Other direction, not so much. Signing out of one app doesn't automatically sign out of the others. Fine for personal scenarios, but this is a security disaster for the enterprise. Handing off an iPad that's logged into someone else's OneDrive account is a serious gotcha, and there's no timeout setting. This will be a deal killer for many companies.