If you use the telephone to activate your product, you provide an Installation ID code. You can activate your product by means of the Internet or by telephone. How does product activation work? Product activation validates that the product key has not been used on more personal computers than are permitted by the end-user license agreement. However, some computer manufacturers may activate the Microsoft software in the factory. If you purchased a new computer from a personal computer manufacturer, you may have to activate the Microsoft software on that computer. Who needs to activate their copy of Office? Product activation is required for all licenses that are purchased through retail distribution. When you activate your product, no personal information is sent to Microsoft. Product activation is an anti-piracy technology that is designed to verify that the product is legitimately licensed. More Information Frequently asked questions What is product activation? We ask that you activate your product to verify that your installation is performed with a genuine Microsoft product. No existing Office files are damaged while the product is in reduced-functionality mode. Additional functionality may be reduced also. In other words, you cannot save modifications to documents or create a new document. In reduced-functionality mode, Office programs function more like viewers. If you do not activate the product after you install it, the Office programs can be started only in reduced-functionality mode. To fully use Office, you must activate Office.

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