The problem arises when a user syncs a mailbox by using an iOS 6.1-based device, prompting excessive logging and resource usage with Microsoft Exchange Server 2010 Client Access server (CAS). It can cause memory and CPU usage to increase significantly, impacting performance.
IT administrators have already reportedly been blocking iOS 6.1 devices from syncing, and now Microsoft is presenting this as a workaround until it, and Apple, can find a solution for the issue.
"You can block iOS 6.1 users by using the Exchange Server 2010 Allow/Block/Quarantine feature," a Microsoft advisory on the issue reads.
Microsoft also details a couple of other options to work around the problem before it is fixed.
iOS 6.1 has been the root of several different problems since its launch in late January. Users reported that they had decreased battery life after updating, which is a common complaint when a new iOS iteration is put out. Then there were reported of intermittent 3G signal issues, which were later confirmed by multiple mobile service providers in Europe.
Apple has already pushed out iOS 6.1.1 exclusively for iPhone 4S, which is the model most affected by the 3G signal issues.
Last week, a jailbreak tool called evasi0n also took advantage of security flaws in iOS 6.1 to jailbreak all iOS 6 devices, including the iPhone 5 and iPad mini. Apple will be glad when it can push out a bunch of bug fixes for all iOS devices.
Written by: James Delahunty @ 12 Feb 2013 19:14