On the right, under Do you want to add this product to an existing account?, choose Sign in. Entering your original Office 365 product key won't work because a key that has already been redeemed can't be used again. To renew your subscription with a product key, you need a new and unused key for the same Office 365 plan. To learn more, see Moving to the new Office 365 plans for small and midsized businesses. For new customers considering buying Office 365 Small Business Premium for the first time, we recommend purchasing the new Office 365 Business Premium plan, instead. Note: Office 365 Small Business Premium is moving to a new plan, Office 365 Business Premium. If you have problems with activation, check out this list of common product key errors and solutions. Review the information shown, check the box, and choose Start.Įnter your Office 365 activation key and follow the prompts to activate your subscription.
To activate a new subscription with your product key, go to the Redeem your product key page. Enter a product key you bought from a retail store 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