Activate Office - Microsoft Support
Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.
Where to enter your Office product key - Microsoft Support
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 Office, or you can renew your Microsoft 365 subscription.
Find your Office product key - Microsoft Support
Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead. Using product keys with Office.
Using product keys with Office - Microsoft Support
You'll receive a product key if you buy a one-time purchase Office or individual Office apps, but you won't need or receive a product key for Microsoft 365. To renew your Microsoft 365 subscription, you can buy an Microsoft 365 product key card from a retailer and redeem the key at https://microsoft365.com/setup .
Download and install or reinstall Office 2019, Office 2016, or Office ...
Some Office 2019, Office 2016, and Office 2013 products come with a product key. If yours did, before installing Microsoft 365 for the first time, sign in with an existing or new Microsoft account and enter your product key at office.com/setup .
Download and install or reinstall Microsoft 365 or Office 2021 on a …
Microsoft 365 or Office for home. If you have a home product and it came with a product key*, before installing for the first time (or sharing it if you have Microsoft 365 Family), you need to redeem your product key first. Go to office.com/setup and sign in with an existing or new Microsoft account and then enter your product key to redeem it ...
Transfer your Office license to another device or another person
Transfer your Office license to another device or another person. You can install a one-time purchase of Office such as Office Home & Business, Office Home & Student, or Office Professional Office on only 1 PC or Mac.
Change your Office product key - Microsoft Support
This article applies to Office Home & Business, Office Professional, and individually purchased Office apps. To switch an Office install to or from Microsoft 365, see Switch your Office license. Change the product key for your version. How you change the product key depends on your version of Office. Select your Office version from the tabs below.
Unlicensed Product and activation errors in Office
If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.
Find your Windows product key - Microsoft Support
If you're looking for product keys for Office, apps, games, and more, see Find your Microsoft downloads and product keys. Learn how to find a Windows product key for activation, and when you'll use a digital license instead.