You can use an Office 365 key to activate a new subscription, renew an existing subscription, or add more user licenses to an existing subscription. Choose how to use your Office 365 product key For example, if you bought Office 365 online directly from or the Microsoft Store, you can sign in and set up Office 365 for your organization without entering a product key.
Tip: In most cases, you won't need a product key for your Office 365 for business subscription. If you lost your product key, see Find your Office product key. Trying to enter a product key for Office for home products? For help, including help for Office 365 Home, Personal, or University, see Where to enter your Office product key. You can use an Office 365 for business product key to activate, renew, or add licenses to a subscription if you're one of the following:Ī customer who bought Office 365 from a retail store, either online or in personĪ volume licensing customer who bought Office 365 through a Microsoft Open program
