Under "Product Information," click Change Product Key (or "Activate Product" if it hasn't been activated yet).
Free keys found online are often unauthorized, expired, or have reached their activation limit, leading to "Product Deactivated" messages. office 2016 serial key
Many "key generators" or "activators" are bundled with malware, viruses, or spyware that can compromise your personal data. Under "Product Information," click Change Product Key (or