Product Activation and Key Information

Microsoft includes product activation technology in some products sold through the Volume Licensing channel. A product key is required to activate these products.

Note to Microsoft Volume Licensing customers: You can find your Volume License Product Keys at the Volume Licensing Service Center (VLSC).

Recent Changes to Volume Activation

With Volume Licensing for products such as Windows 8.1, Windows Server 2012 R2, Windows Server 2012 R2 for Embedded Systems, Windows 7, Windows Server 2008 R2, Windows Vista, Windows Server 2008, Microsoft Office 2010, and Office 2013, you must use Volume Activation (VA). To activate these products with VA, you can use either a Multiple Activation Key (MAK) or Key Management Service (KMS).

How to Get Volume License Keys

Look up the product for which you need a key. Information on how to get your key will be displayed. Not all Volume Licensing products require a key. Volume license products using Volume Activation are pre-installed with a KMS client setup key. You will not need to enter a key for products on your client machine if you are using KMS activation. If a product is not listed, no key is required.

Find Products

Note: Not all Volume Licensing products require a key. If a product is not listed, no key is required.

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Related Resources

Product Key FAQ

Find answers to common questions about product keys and activation.

Product Licensing FAQ

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Volume activation guidance

Browse responses to top Microsoft product licensing customer inquiries.