There are many reasons why I love Microsoft Exchange, but Exchange Activesync with Direct Push is possibly my favorite feature. Microsoft Exchange Activesync was introduced with Exchange 2003 and for the first time Windows CE devices were able to synchronize directly with an Exchange server. Before Microsoft Activesync some form of middleware was required to have mobile phones sync with Exchange, and most notably RIM’s Blackberry Enterprise Server was the way to achieve this, but only with Blackberry devices.

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