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Using a Microsoft account and linking it with your Office for home product connects you to various Microsoft products and services, and makes it simple to reinstall Office without a product key.
Note: Linking a Microsoft account with Office only applies to Office 365 Home, Personal, or University or Office 2013 or later versions such as Office Home and Student, Office Home and Business, Office Professional and some versions of Office Professional Plus.
A few things to keep in mind:
A Microsoft account is required to install and activate Office versions 2013 or later, and Office 365 Home, Personal, or University.
You might already have a Microsoft account if you use a service like Outlook.com, OneDrive, Xbox Live, or Skype; or if you purchased Office from the online Microsoft Store.
If you don't have a Microsoft account yet, you’ll be asked to create one the first time you install or activate your copy of Office.
When you link your Microsoft account to Office, it means anytime you want to install or reinstall Office you won't need to re-enter your product key, or hang on to an installation disc or thumb drive.
If you use Office 365, you can add your credit card information to your Microsoft account and turn on auto-renew for your subscription so Office is always available.
Before you install your Office for home product, you need to associate it with a Microsoft account.
This account is required for all new versions of Office, including Office 365 subscriptions, a one-time purchase of an Office suite such as Home and Student, or a stand-alone app such as Word or Excel.
You already have a Microsoft account if you use a service like Outlook.com, OneDrive, Xbox Live, or Skype; or if you purchased Office from the Microsoft Online Store.
In most cases, the association between your Microsoft account and Office, takes place the first time you’re asked to sign in, such as when you enter your product key at office.com/setup or when you’re activating a pre-installed version of Office on a new PC.
Just click Sign in and type your email address and password.
If you don’t yet have a Microsoft account, you can easily create one using your existing email address, just click, Create a new account and fill out the required fields.
You’ll use your Microsoft account anytime you want to install or reinstall Office—there’s no need to re-enter your product key, or hang on to an installation disc or thumb drive.
Whenever you’re ready to install, just go to office.com/myaccount and sign in using your email address and password, and then click Install.
An added benefit of having your account linked to Office means if you forget your password you can easily reset it using the security information you supplied when you created it.
This avoids the risk of having to repurchase Office if you had a product key and lost it.
A Microsoft account also allows you to flow seamlessly between various Microsoft products and services, and gives you one place to view or update your account profile and security settings; and if you have Office 365, you can also update your credit card information, turn auto-renew on or off, or cancel your subscription.
For more information about using your Microsoft account with Office, go to aka.ms/officemsaccount.