Microsoft Office 365 | Product Key

For legitimate users, the safest way to store a product key is to redeem it immediately. Once the key is linked to your Microsoft account, the burden of storage shifts from you to Microsoft. You can view your subscriptions and installations by logging into your Microsoft account dashboard online. If you must keep a physical record, store the card or receipt in a secure location separate from your computer, ensuring that a burglar cannot steal both your hardware and the software licenses to run it.