Click the Office button, point to Prepare, and then click Add a Digital Signature.
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Click Signature Services from the Office Marketplace to sign up for a digital certificate,
or click OK to create your own.
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If you don't have a digital ID,
click the option to get an ID from a Microsoft Partner or create your own, and then click OK.
Enter your name, e-mail address, organization name, and geographic location.
Click Create.