Enable message encryption and decryption

Microsoft Purview Message Encryption lets email users send encrypted messages to people inside our outside their organization. As an administrator, you can enable Microsoft Purview Message Encryption by creating mail flow rules (also known as transport rules) that set the conditions for encryption. When one of your users sends a message that matches the conditions of the rule, the message is encrypted.

To learn how to create mail flow rules for encryption, see Define rules to encrypt or decrypt email messages.

Tip

If you're not an E5 customer, use the 90-day Microsoft Purview solutions trial to explore how additional Purview capabilities can help your organization manage data security and compliance needs. Start now at the Microsoft Purview trials hub. Learn details about signing up and trial terms.

See also

Encryption in Office 365