If you are attempting to activate a copy of Office 2007 that was part of a volume license (often used by businesses) or if the key has been flagged as "compromised," the system may reject the code.
When you insert the Microsoft Office 2007 installation disc or run the setup file from a downloaded image, the installation wizard guides you through a linear process. If you are attempting to activate a copy
Search for the "Microsoft Volume Licensing Activation Centers" phone list, which remains active even for older retail products. Invalid Confirmation Code If you are attempting to activate a copy
– After verifying the Installation ID, the system provides a 48-digit Confirmation ID . The user enters this ID into boxes labeled A through H in the wizard to complete the activation. Microsoft Learn Support and Current Status Find your product key for Office 2007 - Microsoft Support If you are attempting to activate a copy