1. Symptom – KMS host not activating clients (Windows 7 & W2K8 R2)
2. Cause – KMS server was not licensed
3. Resolution – installed product key and activated it – after that all the clients were able to activate against KMS host machine.

If your company is currently a volume licensed customer with Microsoft, you most likely take advantage of volume activation to automate and manage the activation process for Vista and Windows Server 2008.

If you are not utilizing KMS – why not?  🙂

With the RTM of Windows 7 & Windows Server 2008 R2, you will need to apply a patch, install the proper product key and activate it.

If you are a volume license customer and are not using KMS, you will first need to download/install the KMSW2K3.exe file to install KMS 1.0 for Windows Server 2003 and later.

1.) Use the Kmsw2k3 file to install KMS 1.0 for Windows Server 2003 and later, if it is not already installed.

Download KMS W2K3 version 1.1 for Windows Server 2003 x86
Download KMS W2K3 version 1.1 for Windows Server 2003 x64

2.) Restart after install (necessary).

3.) Run the KB968915 update file.

Download the Update version 1.2 for Windows Server 2003 x86
Download the Update version 1.2 for Windows Server 2003 x64

4.) Restart after applying update (necessary).

Note If you do not restart the computer after you install the KB968915.exe file, you may receive the following error message when you enter the product key: Error: 0xc004f050 The Software Licensing service reported that the product key is invalid.

5.)  Next steps:

  1. Install and activate the appropriate KMS key from Volume Licensing Service Center
  2. Make sure that the firewall for your computer is configured correctly to enable incoming communication with the KMS host computer through TCP port 1688.
  3. Make sure that the KMS host computer is published by DNS service location (SRV) resource records to enable automatic discovery for KMS client computers.

Run the following command in an elevated Command Prompt window, where Key is the enterprise volume license key:

cscript C:\Windows\System32\Slmgr.vbs -ipk Product Key

Activate the KMS host using the Internet by running this script:

cscript C:\Windows\System32\Slmgr.vbs -ato

Note These steps are provided in the VA 2.0 Deployment Guide.

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