Sign in with the account you use for SkyDrive, Xbox LIVE, Outlook.com, or other Microsoft services.
Sign in with the account provided by your work or school to use with Office 365 or other Microsoft services.
The Product ID is specific to your 2007 Microsoft Office system license and is verified during product activation. After it has been activated, the Product ID for your Office program is located on a window that looks similar to the following:
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