You may find unused physical copies (which include the key on a sticker inside the box) on sites like Amazon or eBay. Be cautious of "key-only" digital sales from unknown sites, as these are often unauthorized or non-functional.
Since official sales ended years ago, you must rely on secondary markets or your own records: buy office 2007 product key
If you previously owned the software, look for a 25-digit alphanumeric code on a sticker inside the CD case or on a Certificate of Authenticity card. You may find unused physical copies (which include
If Office 2007 is on an old computer, you can recover the key using these methods: buy office 2007 product key