Apple suggest temporary solution for iOS 6.1 Exchange bug
Apple recently released iOS 6.1 for iPad and iPhone and the update hasn't gone as smoothly as planned. In addition to a 3G connectivity bug, Microsoft has officially blamed the update for not playing nice with Exchange Servers, and the two companies have announced a temporary solution.
After the update, users attempting to sync with Microsoft Exchange Servers caused server overloads and increased CPU and memory consumption. In addition, users have ended up blocked from Office 365 Exchange Online and Apple is supposedly working on a permanent fix.
Thankfully, the two companies have collaborated on providing a temporary solution and workarounds are available for both users and administrators. As for as users go, turning off Calender syncing for 10 seconds before turning it back again appears to be enough. On the other hand, Microsoft is encouraging administrators to create a custom throttling policy for iOS 6.1 users or take a more drastic measure by blocking them completely.