Microsoft urges blocking iOS 6.1 users over Exchange bug


Microsoft (NASDAQ:MSFT) is recommending that IT administrators consider throttling or even blocking mobile devices running Apple's (NASDAQ:AAPL) iOS 6.1 while the two firms work to resolve an issue preventing some iPhone and iPad users from syncing their mailbox with Microsoft's Exchange Server 2010.

"When a user syncs a mailbox by using an iOS 6.1-based device, Microsoft Exchange Server 2010 Client Access server and Mailbox server resources are consumed, log growth becomes excessive, memory and CPU use may increase significantly, and server performance is affected," Microsoft explained in a support document posted Tuesday. "Additionally, Office 365 Exchange Online users receive an error message that resembles the following on an iOS 6.1-based device: 'Cannot Get Mail, The connection to the server failed.'"

Microsoft said it is collaborating with Apple to investigate the issue, but in the interim, administrators are urged to consider several temporary workarounds, instructing customers to "not process Calendar items such as meeting requests on iOS 6.1 devices. Also, immediately restart the iOS 6.1 device." If Exchange Server problems continue, Microsoft suggests removing and recreating the device partnership, creating a custom throttling policy for iOS 6.1 users or blocking iOS 6.1 devices entirely.

Apple issued iOS 6.1 to iPhone, iPad and iPod touch devices two weeks ago. Some iPhone 4S owners soon began complaining the update accelerated battery drain and prompted some overheating concerns, and over the weekend, British operator Vodafone even warned subscribers not to upgrade iPhone 4S models after determining the software triggered 3G connectivity problems. On Monday, Apple began rolling out iOS 6.1.1, a software update that promises to fix iPhone 4S connectivity and improve overall performance and reliability but does not address the Exchange Server syncing snafu.

Apple devices are increasingly popular with the enterprise segment: Forrester Research's second annual Forrsights Workforce Employee Survey reports that 33 percent of workers surveyed would choose an iPhone for their next work smartphone purchase, outpacing Google's (NASDAQ:GOOG) Android at 22 percent.

For more:
- read this 9to5Mac article
- read this Apple Insider article

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