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Email Encryption Solutions in Microsoft 365 looks at how messages and attachments are protected both within the Microsoft 365 ecosystem and when they are sent to external recipients. This course outlines the various protection mechanisms at play, how they work, and how to use them. In addition to encryption and information rights management, we see how encrypted messages can be customized with an organization’s branding and what additional functionality comes with custom branding.

Learning Objectives

  • Gain an overview of Microsoft 365 email encryption
  • Learn how to implement email encryption
  • Understand advanced message encryption

Intended Audience

This course is intended for students working towards the SC-400: Microsoft Information Protection Administrator exam or those students wanting to learn about Microsoft 365 email message encryption.


There are no mandatory prerequisites required to take this course, but an understanding of how email works and previous experience with PowerShell would be beneficial.


Microsoft Purview message encryption enables email encryption and information rights management for messages sent to recipients inside and outside the Microsoft 365 ecosystem. Messages and office document attachments where the total payload is under 25MB are automatically encrypted. In addition to encryption while in transit, messages and attachments are protected by information rights management. With encryption set up, users can choose “Do not forward” or “Encrypt-only” from the Outlook option’s encrypt menu. Advanced message encryption, which comes with E5 subscriptions, enables admins to create custom configuration templates. The default OME and custom configurations can change the look of encrypted emails. Custom configurations enable message expiration and revocation.


aMy name is Hallam Webber, and we have been looking at how to encrypt and protect email messages in Microsoft 365.

About the Author
Learning Paths

Hallam is a software architect with over 20 years experience across a wide range of industries. He began his software career as a  Delphi/Interbase disciple but changed his allegiance to Microsoft with its deep and broad ecosystem. While Hallam has designed and crafted custom software utilizing web, mobile and desktop technologies, good quality reliable data is the key to a successful solution. The challenge of quickly turning data into useful information for digestion by humans and machines has led Hallam to specialize in database design and process automation. Showing customers how leverage new technology to change and improve their business processes is one of the key drivers keeping Hallam coming back to the keyboard.