The KMS Host installation and activation process for Microsoft Office 2013 is similar to the one for Microsoft Office 2010.
Installation of the update that adds support for Windows 8 and Windows Server 2012 to Windows 7 and Windows Server 2008 R2 KMS hosts is required for a successful installation of the KMS Host. The update can be downloaded from the link http://support.microsoft.com/kb/2757817.
STEP 1: If you have not downloaded and installed the update to add support for Windows 8 and Windows Server 2012 to Windows 2008 R2 KMS host, please do so by accessing the link http://support.microsoft.com/kb/2757817 and downloading and installing the appropriate update.
STEP 2: Download the Microsoft Office 2013 Volume License Pack from the Microsoft Download Center (MSDL) site
STEP 3: Double-click the downloaded EXE to run it:
STEP 4: Click Yes on the "Would you like to enter a Microsoft Office 2013 KMS host product key …" prompt and enter the KMS Host Key:
STEP 5: Key installed and activated: