Install and activate Office A Microsoft account or work or school account is required to install and activate Microsoft 365 and Office versions 2013 or later.Ĭonnect to other Microsoft services Once your account is associated with your Office product, and depending what version of Office you have, your account also connects you to various Microsoft products and services such as Office Online or OneDrive. Signing in with your account allows you to: Why do I need an account to sign in to Office?Īn association occurs between Office and your account and is what verifies you're the licensed owner of Office. How do I change the account name? Why do I need an account to sign in to Office? If the username lookup wasn't successful, for example you hadn't set up or no longer have access to your security contact information, try looking for your Microsoft account username within other products or services that you know are associated with that account.'Office isn't associated with this account' message

When you see the account you're looking for, select Sign in. Request a security code to be sent to the phone number or email you used. Look up your username using your security contact phone number or email address.

If you previously set up security info on your Microsoft account, you can use this option to retrieve your username. Move on to the next step: Step 2: Check products or services where you used your Microsoft account Lookup your username if you have security info set up on your account Tip: This option won't work if you don't have security info set up on your account or if you can no longer access that security info.

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