Send S/MIME or Microsoft Purview encrypted emails in Outlook using a work or school account with a qualified Microsoft 365 subscription.

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

If you have a Microsoft 365 Family or Microsoft 365 Personal subscription, Outlook includes encryption features that let you share your confidential and personal information while …

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.

In an email message, choose Options, select Encrypt and choose the encryption option that has the restrictions you'd like to enforce, such as Do Not Forward or Encrypt-Only.

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

5 days ago · After updating to Current Channel Version 2511 (Build 19426.20218) recipients may not be able to open “Encrypt Only” emails. In the Reading Pane you may get a message "This …

Create email encryption or decryption rules in the Exchange admin center using a keyboard and screen reader.

Note: If you don't see the Security option for your account it's possible that account type, or email provider, doesn't support S/MIME.

Encryption is the process of converting data into a code to prevent unauthorized access. In Windows, this can be achieved using built-in tools that allow you to encrypt files and folders, …