Find the Product ID for your Office program
The Product ID, also known as PID key or PID, is specific to your Microsoft Office 2010 license and is verified during product activation. After your Office program has been activated, do the following to see the Product ID:
Click the File tab, and then click Help.
The Product ID appears under the About Office suite name or About Office program name section, for example, Microsoft Office Professional 2010 or Microsoft Word 2010.