Activate Office - Microsoft Support
Select your version of Microsoft 365 below to learn how to activate Microsoft 365. Activate Microsoft 365 or a non-subscription version of Office. Activate Microsoft 365 or a non-subscription version of Office that's pre-installed on a new Windows device.
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.
Using product keys with Office - Microsoft Support
If Office is prompting you for a product key, and you want to buy a product key to activate Office, it's better to uninstall your current version of Office and then buy and install a new version of Office from the Microsoft Store. This way you can be sure that Office will activate successfully.
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.
Change your Office product key - Microsoft Support
How to change your product key to fix activation errors that can occur if you own and install multiple one-time purchases of Office..
Download and install or reinstall Microsoft 365 or Office 2021 on a …
Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Download and install or reinstall Office 2019, Office 2016, or Office ...
Office might activate automatically. However, depending on your product you might see the Microsoft Office Activation Wizard. If so, follow the prompts to activate Microsoft 365 . If you need activation help, see Activate Office.
Activate Windows - Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
Difference between product key and activation code - Microsoft …
In summary, a product key is used during installation, while an activation code is used to activate the software afterwards. Both are essential for ensuring a legitimate and functional software experience.
Unlicensed Product and activation errors in Office - Microsoft …
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.