A "Confirmation ID" is a specific set of numbers provided by a Microsoft representative (or their automated phone system) after you provide a unique "Installation ID" generated by your specific PC. An offline "generator" cannot realistically predict this handshake between your hardware and Microsoft's servers. Microsoft Learn Legitimate Ways to Get a Confirmation Code
This is the recommended method. The Activation Wizard connects to Microsoft’s servers to verify your key and activate the product automatically. Microsoft Office 2007 Activation Confirmation Code Generator
If you are looking for a "generator" tool to bypass Microsoft's security, you should proceed with extreme caution. Here is why: A "Confirmation ID" is a specific set of