Additionally, retail product CDs (a boxed product purchased from a retail outlet) cannot be used for multiple installations. Volume License and MSDN media are the only media available for multiple installations.
To use Volume License or MSDN media, volume license customers must obtain a Volume License product key for the licensing program in which they are enrolled. When you install Office you are prompted for a 25-character product key. Use the appropriate Volume License product key instead of the product key that is located on the CD packaging.
Office 2010 products now use two different kinds of Product Keys for Volume Licensing. In some cases, two kinds of keys will be made available. They are briefly described in the following.
- Key Management Service (KMS): A computer serves as the KMS host, which requires an Office 2010 KMS host key to be installed and activated. This establishes a local activation service in your environment. Office 2010 client computers connect to the local KMS host for activation.
- Multiple Activation Key (MAK): With a MAK key, Office 2010 client computers activate online by using the Microsoft-hosted activation servers or by telephone.
If you have any questions about Volume License product keys, contact the Microsoft Activation Center for your region. United States customers, call (888) 652-2342. International customers, visit the following Microsoft website: