Product ID can be found by launching Age of Empires III and clicking Help and Tools / About from the main menu. Your product ID is shown at the bottom of the About screen. Note: Enter your Age of Empires III Product ID and not your WarChiefs Product ID.
Age of Empires III CD Key: - - - -
Age of Empires III Product ID: - - -
Enter the characters you see in the image below: