When Apple released their iOS 6.1 software there were a number of bugs that users were experiencing, one was related to 3G on the iPhone 4S and Apple fixed this by rolling out iOS 6.1.1 to the iPhone 4S.
Another bug that users were experiencing with iOS 6.1 was to do with Microsoft’s Exchange, Apple has now announced that they are going to release a software update to address the issue.
Apple has also provided a temporary solution for the exchange bug in iOS 6.1 which should work until the software update is pushed out to iOS devices, you can see details of the fix below.
When you respond to an exception to a recurring calendar event with a Microsoft Exchange account on a device running iOS 6.1, the device may begin to generate excessive communication with Microsoft Exchange Server. You may notice increased network activity or reduced battery life on the iOS device. This extra network activity will be shown in the logs on Exchange Server and it may lead to the server blocking the iOS device. This can occur with iOS 6.1 and Microsoft Exchange 2010 SP1 or later, or Microsoft Exchange Online (Office365).
* An exception is a change to a single instance of a repeating calendar event.
Apple has identified a fix and will make it available in an upcoming software update. In the meantime, you can avoid this bug by not responding to an exception to a recurring event on your iOS device. If you do experience the symptoms described above, disable then reenable the Exchange calendar on your iOS device using the steps below.
Go to Settings > Mail, Contacts, Calendars
Select the Exchange account from your Accounts list.
Turn the switch for Calendars to OFF.
Wait ten seconds.
Turn the switch for Calendars back to ON.
You can find out more information on the Exchange bug with iOS 6.1 over at Apple’s support website.