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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...

From the Approvals hub Select Apps in Teams. Search for and select Approvals. Select Open. If you’re in the new view of a new request, select New approval request > Adobe Sign. If you’re in the classic view, select E-sign > Adobe Sign. From a chat or channel Select Chat or Teams in Teams.

Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the security of messages. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public ...

To learn about digital signatures (also known as digital ID), what they can be used for, and how to them in Word, Excel, and PowerPoint, see All about digital signatures. Create a signature line in Word or Excel In the document or worksheet, place your pointer where you want to create a signature line. On the Insert tab, select Signature Line in the Text group. In the Signature Setup dialog ...

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

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.

Signing in connects the apps to the rest of Microsoft 365, letting you save files to the cloud, share files with others, and have your documents save automatically as you work.

Registering a device gives your phone access to your organization's services but doesn't allow your organization access to your phone. If you're an administrator, you can find more information in Configure and enable users for SMS-based authentication. If your organization hasn't made SMS sign-in available, you won't see an option for it when registering a phone with your account. When you ...

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.