IT departments are more willing to keep iPhone and Android-using employees happy — bad news for Windows Phone 7. We all know by now that Microsoft’s mobile life hangs in the balance with Windows Phone 7. Sure, Redmond will carry on if WP7 is a bust, but the software giant will be shut out of the smartphone game, one of the most important and rapidly growing tech markets.Microsoft is not taking any of this lightly, lining up the hardware partners such as HTC, Samsung and LG and pouring close to $500 million into the marketing of its new mobile OS. Today Microsoft announced that Windows Phone 7 has been released to manufacturing (RTM), the last step before general availability. SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe Early reviews of Windows Phone 7 commend it as a much-needed mobile clean slate for Microsoft with a unique tile-based user interface that brings together different Microsoft products and services such as 2010 versions of Office, Exchange, SharePoint, as well as Zune, Bing and Xbox Live. Windows Phone 7 will have to win over consumers and more open-minded corporate IT departments.Nevertheless, WP7 is late. Very late. It should have been in peoples’ hands a year ago. Microsoft may be promoting Windows Phone 7 as the ultimate phone for work and play, but the “play” part will be a tough sell. Your average consumer is not thinking about Windows Phone 7. They’re too busy staring at their beloved Droids and iPhones.In the past year: Google and its hardware partners have released an army of Android phones that have seduced consumers; Apple released the iPhone 4 in June; and RIM continues to build on its corporate user-base and last month released its most dynamic phone, the Torch 9800. Windows Phone 7? Um, we’re still waiting for version 1.0. The “work” part won’t be a cakewalk either. WP7 will be challenged by a changing corporate IT culture more open to supporting workers’ personal phones. Slideshow: Windows 7 Hardware in Pictures: The Latest and Greatest Laptops Slideshow: Microsoft’s Home of the Future: A Visual TourIndeed more IT departments have been allowing employees to run corporate e-mail accounts on their personal iPhone, Droid and BlackBerry smartphones as more phone makers support ActiveSync, Microsoft’s mobile protocol for connecting mobile phones to Exchange.Why does this make IT happy? Because it keeps employees from complaining about corporate-sanctioned phones that they don’t want to use and it helps organizations cut back on operational costs. But it’s a problem for Microsoft — and also for current enterprise mobile leader RIM. Windows Phone 7 has little chance of winning over consumers right away, but the enterprise is an area where Microsoft could gain traction quickly — but not if personal phones that meet corporate requirements keep encroaching. John Halamka, CIO of Beth Israel Deaconess Medical Center in Boston and Harvard Medical School, wrote in an e-mail response to CIO.com that BIDMC now supports all phones as long as they use ActiveSync.“We are vendor and operating system neutral,” says Halamka. “We support all phones that support Exchange ActiveSynch and meet our security standards.” IT departments, more than employees, may embrace Windows Phone 7 for its seamless integration with Exchange and other Microsoft products and services. But IT’s willingness to keep iPhone and Android-using employees happy could be a significant roadblock for Windows Phone 7 enterprise adoption.What do you think? Will Windows Phone 7 phones find a home at increasingly open-minded enterprises? Shane O’Neill covers Microsoft, Windows, Operating Systems, Productivity Apps and Online Services for CIO.com. Follow Shane on Twitter @smoneill. Follow everything from CIO.com on Twitter at @CIOonline. Email Shane at soneill@cxo.com. Related content opinion Last Words Before Closing Eye on Microsoft By Shane O'Neill Jun 05, 2013 3 mins Small and Medium Business Tablets Windows opinion With Rumored Reorg, Microsoft Tries to Simplify The mounting pressure on Steve Ballmer to streamline Microsoft is finally leading to some action. 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