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Windows Server 2012 Essentials (the latest version of Windows Small Business Server Essentials) is a flexible, affordable, and easy-to-use server solution designed and priced for small businesses with up to 25 users and 50 devices that helps them reduce costs and be more productive. Windows Server 2012 Essentials is an ideal first server, and it can also be used as the primary server in a multi-server environment for small businesses.
RTM Announcement - http://blogs.technet.com/b/windowsserver/archive/2012/10/09/windows-server-2012-essentials-released-to-manufacturing-available-for-evaluation-today.aspx
Windows Server 2012 Essentials Tech Page - http://technet.microsoft.com/sbs/jj159331
Windows Server 2012 Essentials Product Page - http://www.microsoft.com/en-us/server-cloud/windows-server-essentials/default.aspx
Download a Trial - http://www.microsoft.com/click/services/Redirect2.ashx?CR_CC=200142589
FAQ - http://download.microsoft.com/download/0/B/2/0B22F531-338D-4843-B43B-814D922EB724/Windows%20Server%202012%20Essentials%20FAQ.pdf