Office 365 Message Encryption

Office 365 Message Encryption is the new version of Exchange Hosted Encryption (EHE). This version includes all of the capabilities of EHE plus new features, such as the ability to apply your company’s branding to encrypted messages. Like EHE, Office 365 Message Encryption works with Office 365 mailboxes as well as with on-premises mailboxes that use Exchange Online Protection.
Here’s the added good news: Office 365 E3 and E4 users will get Office 365 Message Encryption at no extra cost. We’re including it in Windows Azure Rights Management, which is already part of E3 and E4 plans.  We’re also including it in the standalone version of Windows Azure Rights Management, without raising the price of that service. For $2 per user per month you can get a complete solution for internal and external information protection: traditional Rights Management capabilities like Do Not Forward for internal users, plus the new ability to encrypt outbound messages to any recipient.