Buy on Amazon First, a user can activate the License product by using the Internet: If you choose to activate via the internet, the activation Wizard of Microsoft shall automatically redirect the user to the Microsoft Office license service. It is to verify users serial key and activates the software if the license key is valid and legitimate not pirated. If by any chance the product key is pirated or already in use, the activation Wizard will show users an error. If for any reason, a user fails to activate their software via the internet they can opt for activating it via the use of a telephone explained below. Second, a user can activate the License of the product by using the Telephone.
There are several reasons why you might get an error after entering a product key. For example, the product key may have been mistyped or a product key for a different product might have been used. Are you entering a product key for another Microsoft product?