BYOD nightmare: iOS devices hobble Exchange servers when they synch

A problem has arisen that slows Exchange servers to a crawl when the devices try to synch

Microsoft and Apple recommend that businesses deny certain iPhones, iPads and iPods access to Calendar items until the companies can clear up a problem that slows Exchange servers to a crawl when the devices try to synch.

The problem reveals itself to end users as an error message when they try to update items with Exchange Server 2010 that says "Cannot Get Mail" and "The connection to the server failed," according to a Microsoft support notification. The only option presented to users is to choose "OK," Microsoft says.

[SIMILAR PROBLEM EARLIER: Exchange Outlook Calendaring Problems

[EXCHANGE 2013: What's new? (An early adopter's perspective)

More problematic for IT is that server CPU use jumps, affecting performance for all users. Microsoft describes the problem like this: "When a user syncs a mailbox by using an iOS 6.1-based device, Microsoft Exchange Server 2010 Client Access server (CAS) and Mailbox (MBX) server resources are consumed, log growth becomes excessive, memory and CPU use may increase significantly, and server performance is affected."

IOS 6.1 comes on iPhone 3GS, 4 and 5; fourth and fifth generation iPod Touch; iPad 2, third generation and fourth generation iPads; and iPad Mini. This makes for a major inconvenience for workers who use these devices at work primarily as a way to access emails and calendaring information.

Microsoft recommends that users facing this problem open trouble tickets with Apple to report the problem and diagnose what's causing the problem. "Apple and Microsoft are investigating this issue. We will post more information in this article when the information becomes available," Microsoft says.

The workaround is not to try accessing Calendar from the affected devices. If a user runs into the problem, rebooting the device may clear it up, Microsoft says. If not three other options might work: remove the Exchange account from the Apple device, wait half an hour and reinstall it; throttle the number of iOS devices that can access the server at the same time; and block all iOS devices from the server.

The second option will help protect server performance, but won't prevent the error messages, Microsoft says.

The support notification also advises how to detect whether the problem exists in a particular network.

Tim Greene covers Microsoft for Network World and writes the Mostly Microsoft blog. Reach him at tgreene@nww.com and follow him on Twitter https://twitter.com/#!/Tim_Greene.)

Read more about software in Network World's Software section.

Join the newsletter!

Or
Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags BYODIT managementMicrosoftwirelessAppleNetworkingsoftwareconsumerization of IT

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Tim Greene

Network World
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?