Apple to fix issue with iOS 6.1, Microsoft Exchange sever
The problem occurs when users try to sync their mailboxes using the updated operating system. Apple said it plans to release the fix in an upcoming software update. No date was specified.
Apple described the problem as follows: "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."
Until the fix is available, Apple recommends that users disable and then re-enable the Exchange calendar on their iOS 6.1 device using the following steps: "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."
In a support notice, Microsoft described the problem from its end and said it recommended that IT administrators block or "throttle" iOS 6.1 device users. "The throttling policy will reduce the effect of the issue on server resources. However, users who receive the error should immediately restart their devices and stop additional processing of Calendar items," the notice explained.
Another method is to "remove and re-create the device partnership," which entails the Exchange service administrator running the "Remove-ActiveSyncDevice" cmdlet to remove the iOS 6.1 device on the server side. Users are also advised not to process Calendar items on their device.
Additionally, Microsoft is recommending that IT departments open an enterprise support case with Apple, either through an enterprise agreement or through a "cross-platform integration and command-line interface" pay-per incident case.