Microsoft Volume Licensing

The Microsoft volume licensing service Center lets you sign in and download activation keys for multiple products. If you are a Volume licensing customer, then you need a valid product key for activation for all your Microsoft products. The relevant product keys can be sought from the Volume Licensing Service Center (VLSC).

Microsoft volume licensing


  • Find out if you are able to use the volume licensing product without a key
  • If the product uses a Volume Activation, then it is pre-installed with the Key Management Service (KMS) client setup key
  • In such cases, you do not require a volume licensing key
  • If not, make use of the below steps to obtain an activation key
  • Go to the Microsoft Volume Licensing Service Center and access the Product Keys section
  • Here, you will find a key for the following
    • Open
    • Open Value
    • Select
    • Enterprise Agreements
    • Service Provider License Agreement (SPLA)
  • If not, you can also call the Microsoft Activation Center to obtain the VLK


  • The Volume Activation (VA) process is applicable to the following products,
    • 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
    • Microsoft office 2013
  • To activate these products, you can make use of the Multiple Activation Key (MAK) or the Key Management Service (KMS)
  • KMS is used by organizations to activate system within their network
  • Whereas, the MAK makes use of the Microsoft’s hosted activation services and does the activation on a one-time basis
  • If both these techniques do not suit your requirement, then you can use the Active Directory–based activation
  • If the organization setup has less than 50 PCs, then you can use the MAK technique with the help of the Volume Activation Management Tool (VAMT)
  • MAK and KMS are issued by Microsoft only for the software that was licensed by the organization
  • You will not be able to use the MAK and KMS for other retail software


This example is for using the Key Management Service (KMS)

  • In the first step, the KMS is installed on a server
  • Then, the KMS host key gets installed on the KMS host
  • To activate it, you need to contact the Microsoft hosted activation services
  • Once it is activated, an SRV record is registered in the DNS
  • The KMS host is discovered by the KMS client computer
  • An RPC request is sent by the client to the host
  • The host then adds the client computer’s ID to a table and returns the activation count to the client
  • The activation count if verified with the activation threshold by the client
  • If it is met, then the product activation is completed for the Microsoft volume licensing

For more information about Microsoft volume licensing call us at +1-888-308-2550 or visit our website at