Activate Microsoft 365 or a non-subscription version of Office. When you start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365. Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365.

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. Tip: Get tech expertise with Business Assist.

Instead, for Microsoft 365, Office 2021, Office 2019 and Office 2016, you can view the Microsoft account that Office belongs to. This account takes the place of your product key and can be used to reinstall Office from the Microsoft account, Services & subscriptions page and to activate 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.

You can set up an authenticator app to send a notification to your mobile device or to send you a verification code as your security verification method. You aren't required to use the Microsoft Authenticator app, and you can select a different app during the set up process.

Download Office language interface packs (LIP) Change the language on the ribbon and commands for some Microsoft Office applications.

A factor in authentication is a way of confirming your identity when you try to sign in. For example, a password is one kind of factor, it's a thing you know. The three most common kinds of factors are: Something you know - Like a password, or a memorized PIN.

After this time, you may be billed, and you’ll need to request a refund to cancel your order. For more info about digital game pre-orders, see: Pre-order Xbox digital games in the Microsoft Store. Visit the links below to find out about refunds for other types of products: Xbox subscription cancellations and refunds.

In the Translate to dropdown, choose the language you want the page translated into. The default is the language you've set for Microsoft Edge. To translate the page, click Translate. To always automatically translate from the source language, select the Always translate from [Language] check box.

There are three areas in Microsoft Office where you may want to change the language. Editing or Authoring is the language in which you write and edit your content. You may need to install an associated keyboard for this language via Windows settings. Proofing tools are spelling and grammar check.