Sometimes these product keys are printed on counterfeit labels or cards with a download link to Microsoft software, and sometimes they’re distributed with software media that is unauthorized for resale, such as promotional media, original equipment manufacturer reinstallation media, or other Microsoft program-specific media. Unfortunately, there are many dishonest sellers who offer stolen, abused, or otherwise unauthorized Microsoft product keys for sale. If you bought a product key separate from the software, it’s very possible the product key was stolen or otherwise fraudulently obtained, and subsequently blocked for use. Note that this product key won't match the product key shown on an Office product key card or in the Microsoft Store for the same purchase. If your Office product key doesn’t work, or has stopped working, you should contact the seller and request a refund. If you still want to view your product key, here's how: Go to the Microsoft account, Services & subscriptions page and sign in, if prompted. If it's hard to read the product key on your packaging, use this guide to help you tell the numbers and letters apart:
If you lose your Product Key and have a valid proof of purchase, contact Microsoft support for help. Keep the packaging, or write the number down and keep it in a safe place.
