When launching Office 2010 applications, a message appears indicating that Office is not activated. Attempts to activate Office may result in the following error:
"Error 0xC004F074: The Software Licensing Service reported that the computer could not be activated. No Key Management Service (KMS) could be contacted. Please see the Application Event Log for additional information."
Error 0xC004F074 equates to, "The Key Management Server (KMS) is unavailable". This error occurs when volume license versions of Office 2010 are installed on client machines using the built-in, KMS client key and an Office KMS host is not available to activate installations of Office 2010.
The following is a partial Office Web Apps Setup product key, required for product installation on Microsoft SharePoint, rather than a product key that is specific to client installations of the Office 2010 suites:
Attempting to enter this key via the File/Help and Change Product Key link will result in the error, "This is not a valid Office Product key. See above examples to learn more".
Attempting to input this key via the ospp.vbs script will result in the error, "0xc004f050 The Software Licensing service reported that the product key is invalid"
To resolve this issue, obtain a Multiple Activation Key (MAK) volume license product key for Office 2010, and then do one of the following:
1) Open an Office 2010 application (i.e., Microsoft Word), go to File/Help, and then click on the Change Product Key link. Enter the Office 2010 product key. After the process of installing the product key completes, close all open Office applications, open Microsoft Word, go to File/Help, and check to see if “Product Activated” is displayed.
2) From an elevated command prompt, run command lines similar to the following (if you are running 32-bit Office 2010 on a 64-bit operating system, the path should include Program Files (x86)):
%windir%\System32\cscript.exe "C:\Program Files\Microsoft Office\Office14\OSPP.VBS" /inpkey:xxxxx-xxxxx-xxxxx-xxxxx-xxxxx (where xxxxx-xxxxx-xxxxx-xxxxx-xxxxx is your 25 digit MAK product key for Office 2010)
%windir%\System32\cscript.exe “C:\Program Files\Microsoft Office\Office14\ospp.vbs” /act
For most Microsoft products, there are two ways to obtain volume license product keys:
1) Go to the Product Keys section of the Volume Licensing Service Center (VLSC) for Open, Open Value, Select, Enterprise Agreements and the Services provider License Agreement (SPLA) - https://www.microsoft.com/licensing/servicecenter/home.aspx
2) Call your Microsoft Activation Center - http://www.microsoft.com/licensing/existing-customers/activation-centers.aspx
Frequently asked questions: Volume activation of Office 2010
Volume activation quick start guide for Office 2010
Microsoft Volume Licensing Product Activation and Key Information
Microsoft Volume Licensing Frequently Asked Questions About Volume License Keys