Almost immediately after the release of Apple iOS 6.1 to the end of January, Microsoft Exchange administrators noticed that devices running the new OS version causing "excessive use" servers. The issue was traced to code Apple used to synchronize Exchange mailbox of a user and calendar events.
The announcement, made at the support page Apple has not shown a deadline for the software, but gave advice to avoid this problem:
Apple has identified a solution and will be available in a future software update. In the meantime, you can avoid this bug does not meet an exception to a recurring event on your iOS device. If you are experiencing the symptoms described above, deactivate and then reactivate the Exchange Calendar on your iOS device ... Apple noted that affected users can notice increased activity of the network or the reduced battery life on their iOS devices. The increased activity appear on the Exchange Server logs and can lead to the device being blocked. This issue affects devices running iOS 6.1 Microsoft Exchange 2010 SP1 or later, or Microsoft Exchange Online (Office365).
On January 28, Apple has released iOS 6.1, the first major update to iOS since September 6. With a few new features and bug fixes, the new software has also prompted many reports of battery discharge sudden and significant and at least one case of overheating of the battery. Suspicion immediately fell on the issue with excessive logging Microsoft Exchange
