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Encrypt a message with Microsoft 365 Message Encryption. New Outlook supports Microsoft 365 Message Encryption as long as your email server has an Office 365 Enterprise E3 license. S/MIME encryption will be supported starting in Fall 2024. In an email message, choose Options, and then select Encrypt.
How do I send an encrypted email message? To send a message with encryption, compose a new message, select the Options ribbon, and then select Encrypt. You can choose Encrypt or Do Not Forward. To remove encryption, select No permission set. Read an encrypted email message using Outlook.com or Microsoft 365
Send encrypted email messages in Outlook. Secure messages by using a digital signature. Get a digital ID. Find digital ID or digital ID services. Send a digitally signed or encrypted message for Mac. Advanced Outlook.com security for Microsoft 365 subscribers. Learn about encrypted messages in Outlook.com. Encrypt messages using S/MIME in ...
Outlook provides various encryption options to help keep your messages secure. To learn more about encryption in Outlook, select a link under the version of Outlook you're using. What version of Outlook do I have? Outlook for Windows. Encrypt email messages
Want to add a padlock to your email messages? You can use S/MIME in Outlook on the web to increase the security of messages. A digitally encrypted message can only be opened by recipients who have the correct key. A digital signature assures recipients that the message hasn’t been tampered with.
A digital signature on an e-mail message helps the recipient verify that you are the authentic sender and not an impostor. To use digital signatures, both the sender and recipient must have a mail application that supports the same encryption type. Outlook supports two encryption options:
As part of our message protection efforts, Microsoft has evolved our email encryption solutions to provide a unified sender experience whether you're sending a protected message inside of your organization or outside your organization.
A digital signature attached to an email message offers another layer of security by providing assurance to the recipient that you—not an imposter—signed the contents of the email message. Your digital signature, which includes your certificate and public key, originates from your digital ID.
Digitally signed messages can be sent to anyone. However, the recipient must be using an email application that supports S/MIME and have installed the S/MIME control to verify the digital signature. Outlook and Outlook Web App both support S/MIME.
A digital ID enables you to send digitally signed messages using Microsoft Outlook. A digital ID—also known as a digital certificate—helps prove your identity and helps prevent message tampering to protect the authenticity of an email message. You also can encrypt messages for greater privacy.