1. Open a Command Prompt as Administrator

2. Navigate to C:Program FilesMicrosoft OfficeOffice14 directory or Program Files(x86) if you installed a 32 bit office on a 64 bit PC.

3. Run the following command to set the KMS server

cscript ospp.vbs /sethst:name of KMS server

4. Run the following command to active office

cscript ospp.vbs /act

Office should now be activated remember KMS needs 25 or more Office activation tries before it starts working just FYI