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Please must remember your Microsoft account and password, otherwise, you won't be able to activate Office again if you forgot the account. Note: After signing-in, your product will be added to your Microsoft account, so that you can reinstall it later, or manage your new subscription without a product key. If you don’t have a Microsoft account yet, please select Create Account. Please sign in with a Microsoft account ① to activate it. When you start an Office app for the first time, the system will inform “ You’ve got Office”.Note: ASUS computer bundles with Microsoft 365, and if you have a one-time purchase of Office Home & Business (ex: Office 2021, or 2019), please follow the following steps to upgrade Microsoft 365 to Office 2021.
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The following activation process takes Office 2021 as an example: (The Office authority will be linked to your Microsoft account.)
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