If you want to know ProductID and the CD-Key of MS-Office, Windows, Exchange Server, and SQL Server installed on your computer.To use a small tool which will help you "ProduKey".
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ProduKey is a small utility that displays the ProductID and the CD-Key of Microsoft Office (Microsoft Office 2003, Microsoft Office 2007), Windows (Including Windows 7 and Windows Vista), Exchange Server, and SQL Server installed on your computer. You can view this information for your current running operating system, or for another operating system/computer - by using command-line options. This utility can be useful if you lost the product key of your Windows/Office, and you want to reinstall it on your computer.
Download : http://www.nirsoft.net/utils/product_cd_key_viewer.html