Office 365 Message Encryption

As managing vice president, Rob Helm covers Microsoft collaboration and content management. His 25-plus years of experience analyzing Microsoft’s technology... more

Office 365 Message Encryption is a Microsoft-hosted service that encrypts e-mail messages, providing end-to-end, persistent protection against leakage of sensitive message content. It can be particularly useful for messages sent to external customers, because it works with a wide range of mail clients and identities on the receiver side.

(This report updates “Office 365 Message Encryption,” which appeared on page 11 of the Feb. 2018 Update.)

Capabilities

Office 365 Message Encryption encrypts outbound messages sent from Exchange Online or through Exchange Online Protection. A new implementation of Office 365 Message Encryption that launched in Sept. 2017 uses Azure Rights Management (RM), the encryption component of the Azure Information Protection service. This enables many new capabilities, including the following:

Recipients can read and respond to encrypted messages in Outlook. The old implementation required opening the message in a separate browser window and a separate sign-in.

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