Enable encryption and decryption

Exchange Online

Applies to: Exchange Online Protection, Exchange Online

Topic Last Modified: 2014-09-30

Office 365 Message Encryption lets email users send encrypted messages to people inside our outside their organization. As an administrator, you can enable Office 365 Message Encryption by creating transport rules that set the conditions for encryption. When an email user in your organization sends a message that matches an encryption rule, the message is encrypted.

You can use the Exchange admin center (EAC) or Windows PowerShell cmdlets for Exchange Online to create these rules. To learn how, see Define rules to encrypt or decrypt email messages.

All Exchange Hosted Encryption (EHE) customers have been upgraded to Office 365 Message Encryption. To learn more about what the upgrade means for you and your email users, visit the Exchange Hosted Encryption (EHE) Upgrade Center.