If Microsoft Office asks you to sign in to activate the products, you need to enter the account that you used to buy Office. Make Sure You Sign in with the Correct Account 10 Tips to Fix Microsoft Office Activation Errors Tip 1. You can check the possible solutions below to fix Microsoft Office activation errors. You need to fix the Office activation errors to successfully activate Office so that you can enjoy all the Office features again. If your Microsoft Office product activation failed or you meet some activation errors in Office, most Office features may be disabled.
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