Office Message Encryption

COMPANY: Microsoft

As part of integrated investments in information protection, Microsoft have introduced rich new email encryption and rights protection capabilities in Office Message Encryption that are built on top of Azure Information Protection. The new Office Message Encryption capabilities make it easier to share protected emails with anybody—inside or outside your organization.

Overall Score


Overall Score


Office Message Encryption Review

Review date: February 18th 2019

Snapshot: End to end email encryption within O365.

What is Office 365 Message Encryption?

Office Message Encryption is Microsoft’s new email encryption service. It works directly within Outlook on Office 365 and aims to help businesses protect sensitive emails, stay in control of their data, and become compliant with their security needs. Recipients of encrypted messages who are in Office 365 will be able to read those messages seamlessly in Outlook. Users that receive encrypted messages on other email clients can view the messages in the OME portal.

For: SMBs looking for easy to use email encryption without using a third party solution.

Not For: Companies looking for advanced reporting capabilities or auditing and reports.


  • Allows sending of encrypted emails both inside and outside an organisation, with contacts who do not use O365 able to easily log in and view encrypted email
  • Low pricing for cost effective email encryption
  • Easy for end users to send and access encrypted email as it operates out of Office, so there is no third party functionality for them to lean
  • Easy to configure functionality for admins to set policies over which emails are encrypted
  • Easy to implement, being fully integrated with Office 365
  • End users have access to controls over encrypted email they send with policies such as blocking forwarding, and custom policies can be created
  • Secure gateway requires a users normal Microsoft account and password as the key to the email, so accessing encrypted messages is easy

Expert Insight:

Office Message Encryption is a new encryption service, and currently a relatively basic one. The secure web portal used to encrypt emails is an effective security measure which will protect sensitive emails, however it may not be as secure as alternative service which require a separate password to the one used to access the users email account. The service is easily implemented, and easy for end users to navigate. There are also some customisable policies for encrypted emails, such as end users being able to choose if they want the encrypted email to be forwarded or not. But this is a bare bones service. There are much less customisable policies offered than competitors, who generally offer the ability to stop copying and pasting and have attachment protection.

Microsoft do offer custom policies, but these can be complicated to make, and many of the features you may wish to build come as standard with other services. For example, the process to revoke the rights to encrypted email is much more complicated on Microsoft’s service than competitors like Mimecast, which allows this through a click of a button in Outlook. There is also no reporting or analytics of the encryption service offered at present.

This service is not as fully featured as competitors and will therefore appeal to O365 customers requiring a basic and easy to use email encryption service. However, for organizations requiring more advanced features, companies should consider trialling a more fully featured encryption service.

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Microsoft Vendor Overview

At Microsoft, our mission is to empower every person and every organization on the planet to achieve more. Our mission is grounded in both the world in which we live and the future we strive to create. Today, we live in a mobile-first, cloud-first world, and the transformation we are driving across our businesses is designed to enable Microsoft and our customers to thrive in this world.

Employees on LinkedIn 159796
Glassdoor Rating (18161 reviews)
Founded 1975
Revenue $10+ billion (USD) per year
Headquarters Redmond, WA, US
Support Team Location(s) US & Ireland

Office Message Encryption Service Overview

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Office Message Encryption Features

Office 365 Message Encryption Features

Feature Description
Secure Web Portal Internal and external recipients using O365 receive email in Outlook and are taken to the web portal, where they sign in to access their email within O365. Non O365 need to sign into web portal
Customisable Policies Do Not Forward option, encrypt only option, default and custom templates
Ease of Use for End Users Easy to navigate encrypted messages with Office 365 interface, no need for any third party services
Auditing and Access Reports None currently offered
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Score Breakdown

Encryption Methods
Customizable Policy
Ease of Use for End Users
Auditing and Reporting

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