To enter Microsoft Office 365 product key, visit office.com/setup, sign in with your Microsoft account, and enter the 25-character product key when prompted.
Enter Microsoft Office 365 Office product key
To
enter Microsoft Office 365 product key, follow these steps:
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Visit office.com/setup.
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Sign in with your Microsoft account or create one.
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Enter your 25-character product key when prompted.
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Follow the on-screen instructions to download and install Office.
Once done, you can activate Office and start using it on your device.
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