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.

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 …

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

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 …

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content

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.

Senden Sie verschlüsselte S/MIME- oder Microsoft Purview-E-Mails in Outlook mithilfe eines Geschäfts-, Schul- oder Unikontos mit einem qualifizierten Microsoft 365-Abonnement.

[FIXED] Error replying to encrypted emails from Outlook Desktop [WORKAROUND] Outlook sync issues cause emails to be stuck in the Outbox and undeliverable mail items

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.