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On this page
  • Description
  • Policy
  • Licensing Considerations
  • Set Up Instructions
  • End-User Impact
  • PowerShell Scripts
  • Videos
  1. Security
  2. Exchange

Enable Email Encryption

PreviousDomain-Based Message Authentication, Reporting, and Conformance SHALL Be EnabledNextSimple Mail Transfer Protocol Authentication SHALL Be Disabled

Last updated 1 year ago

Description

Email encryption rules can be added to encrypt a message with defined rules such as having a particular keyword in the subject line or body. Most common is to add “Secure” as the key word in the subject to encrypt the message. M365/O365 Message Encryption works with Outlook.com, Yahoo!, Gmail, and other email services. Email message encryption helps ensure that only intended recipients can view message content.

Policy

  • An email encryption policy Shall be configured

Licensing Considerations

To enable this feature, an Azure Information Protection Plan 1 subscription is required which can either be purchased standalone or as part of the following bundles:

  • Microsoft 365 Business Premium

  • Microsoft 365 E3

  • Microsoft 365 E5

Set Up Instructions

End-User Impact

Level: Low

End-Users will likely need some instructions on how to use email encryption within the organization. Depending on how you role it out, they may have to type a specific subject line or leverage a built in plug-in that allows them to encrypt the message on demand. Users will need to open encrypted messages in Outlook on the web vs the email client on the desktop.

Tips

None Currently

PowerShell Scripts

Videos

Follow to configure a transport rule for email encryption.

Set up an email encryption rule:

Set up an email encryption rule (Multi-Tenant):

Verify Message Encryption:

🔐
Azure Information Protection service description - Service Descriptions | Microsoft Learn
Set up Microsoft Purview Message Encryption - Microsoft Purview (compliance) | Microsoft Learn
Add your brand to encrypted messages - Microsoft Purview (compliance) | Microsoft Learn
these steps
https://github.com/msp4msps/Security/blob/master/Email%20Encryption%20Rule.ps1
https://github.com/msp4msps/Security/blob/master/Email%20Encryption%20Rule-All%20Customers.ps1
https://learn.microsoft.com/en-us/microsoft-365/compliance/set-up-new-message-encryption-capabilities?view=o365-worldwide#verify-microsoft-purview-message-encryption-configuration-in-exchange-online-powershell