Deploying the iPhone 3G for business, part 2

Getting iPhones to connect and sync with Exchange servers can be tricky. Here's how to make it all work smoothly.

Deploying the iPhone 3G for business, part 2.

Deploying the iPhone 3G for business, part 2.

The heartbeat interval is dynamically determined by the client device, such as an iPhone or Windows Mobile phone. ActiveSync clients maintain a log of interactions with the server and choose intervals that allow for persistent connections with the longest possible network timeout (the time at which the mobile carrier and/or any network devices between the client and the server will drop the connection).

By using the longest possible heartbeat interval, the client can maintain persistent open connections (those which the client has initiated but the server has not yet responded to) between the client and server without requiring active use of the connection and thus conserving battery life on the device.

Understanding Exchange requirements

As anyone who has administered Exchange knows, there are a number of variables and options in determining the best configuration for an Exchange environment. Factors such as firewall and proxy server configurations, internal and external DNS, the optional use of front-end and back-end servers, the Active Directory forest and domain topologies, and the versions of Exchange and Windows Server used all impact the ultimate design of an Exchange environment.

Other major factors include the use of SSL, whether self-signed certificates or a certificate authority are used (and how they're implemented), which authentication options are used, and which virtual directories on the Exchange server are secured.

In many cases, the variations among unique Exchange environments don't have a huge impact on clients. However, the iPhone is not a particularly forgiving Exchange client, it seems. There are numerous threads on Apple's discussion forums about issues preventing successful communication or sync between the iPhone and Exchange servers. In some cases, administrators report problems trying to integrate iPhones even in environments that already include other ActiveSync mobile devices such as Windows Mobile phones.

Although some admins have pointed fingers at Apple, saying that the company has created a buggy implementation of ActiveSync, the problems in many cases appear to relate to overall network and Exchange environment configuration, or environments that don't meet the specific requirements that Apple has listed for the iPhone. Apple also seems to have designed its ActiveSync implementation to require rather strict adherence to Microsoft's guidelines for mobile device support. (Links to guidelines, documentation, and other resources from Microsoft and Apple are included at the end of this article.)

Unfortunately, Apple's documentation contains very limited details about those guidelines, which means a very solid understanding of and experience with Exchange and its support for mobile devices is a must. Before trying to add iPhones to your network, do your homework and ensure that your Exchange environment meets Apple's stated requirements as well as Microsoft's recommendations for supporting mobile devices via ActiveSync, particularly if you have not worked with mobile device support before. I've included some valuable resources, along with some advice to help avoid commonly reported problems, at the end of this article.

Join the PC World newsletter!

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

Tags smartphonesIT managementiphone 3g

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

Ryan Faas

Computerworld
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Armand Abogado

HP OfficeJet 250 Mobile Printer

Wireless printing from my iPhone was also a handy feature, the whole experience was quick and seamless with no setup requirements - accessed through the default iOS printing menu options.

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?