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 …

In an email message, choose Options, and then select Encrypt. Pick the encryption that has the restrictions you want to enforce, such as Encrypt or Do Not Forward.

Instructions to set up Outlook for encryption and digital signatures To set up Outlook for encryption and digital signatures, choose instructions based on the version of Outlook you're …

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

Learn how to use digital signatures and encryption in Outlook for Mac. Both the sender and recipient must have a mail application that supports the S/MIME standard.

Under Microsoft Outlook Trust Center, select Trust Center Settings. On the Email Security tab, under Encrypted Mail, select the Add digital signature to outgoing messages check box.

To turn S/MIME on: In Outlook, tap the Account control at the top left, then select the Settings button near the bottom left. Tap on the specific account you want to turn S/MIME on for. Tap …

Learn how to use digital signatures and encryption in Outlook for Mac. Both the sender and recipient must have a mail application that supports the S/MIME standard.

To apply IRM protection, S/MIME signature and encryption must be removed from the message. The same applies for IRM-protected messages; users can't sign or encrypt them by using …