During installation, you'll be prompted to enter a product key. Or, after installation, to enter the product key, select the Start button, and then select Settings > System > Activation > Change product key.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install …

Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.

Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it. A digital license is a method of activation in Windows 10 …

In most countries or regions, you can also buy Surface, Xbox and accessories. To redeem a Microsoft gift card, Xbox download code or token, select Redeem code below, sign in, and enter or paste the …

Windows 11 and Windows 10: In most cases, Windows 11 and Windows 10 activates automatically using a digital license and doesn’t require you to enter a product key.

Enter your Office 2016 product key, and then select Install this product instead. If your product key is new, follow the prompts to complete the redemption process.

Use your Microsoft account , not your product key, to install and activate Office and individually purchased Microsoft 365 apps, such as Project, Visio, Word, Excel, and Outlook.

Unlike a product key, which is entered during installation, the activation code is applied after installation. Activation codes are often linked to a specific hardware configuration or user account.

This article provides step-by-step instructions on how to activate Office for Mac. If you're running into errors or issues with installing or activating Office on your Mac, see What to try if you can't install or …