Product downloads can be found at the Microsoft Volume Licensing Service Center:
https://www.microsoft.com/Licensing/servicecenter/default.aspx
or through the preview link after signup:
http://www.microsoft.com/office/preview/en/try-office-preview
Deployment notes can be found here:
http://technet.microsoft.com/en-us/library/cc303401(v=office.15)
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