See how to view the details for signatures and certificates.

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Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Learn how to use encryption and other security settings to protect messages sent from Outlook.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

To create an e-sign request, you’ll need to sign into your account with an available e-signature provider such as Adobe Sign or DocuSign. If you don't have account, it's easy to start a free trial or create an account. Choose the e-signature provider you'll use to create, send, and manage e-sign requests.

How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.

Learn how to identify and open encrypted and protected emails no matter what email client you're using.