Apple recently addressed complaints of a bug in iOS 6.1 that is affecting Exchange users. The company said that users “may notice increased network activity or reduced battery life on the iOS device” because of the bug and that the added network activity due to the bug may end up forcing Exchange Servers to block iOS altogether. “This can occur with iOS 6.1 and Microsoft Exchange 2010 SP1 or later or Microsoft Exchange Online (Office 365),” Apple explained. Thankfully, as Microsoft already noted, a fix is on the way.
Apple said that it will provide the solution in an upcoming software update and said users should turn calendars off on the affected iOS device by visiting settings > mail, contacts, calendars and then turning off the calendars function. After waiting ten seconds, you can turn calendars back on and it should work temporarily.
Apple didn’t say when the update will be issued.