Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser. Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac. Use an existing Microsoft account to get started, then add your new account later. Set up your PC using a local account, then learn how to Change from a local account to a Microsoft account.

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Learn how to install Office 2021, 2019, or 2016 on your PC or Mac.

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