Office 365 - Getting Started with Message Encryption

With Office 365 Message Encryption (OME), you can send and receive encrypted email messages between people inside and outside our organization. Office 365 Message Encryption works with Office 365, Yahoo!, Gmail, and other email services. Email message encryption helps ensure that only intended recipients can view message content.

Note: If you are looking to use a digitally sign and encrypt information to prove its authenticity, please see digital signature documentation.

Why would I want to use OME

Have you ever had your email or documents shared or given to other people than you intended, or seen your company’s information shared with people outside the company by accident? Maybe you have information that you want to share confidentially with only a few trusted colleagues for purposes of collecting feedback, but you’re concerned that the information may get leaked inadvertently before you are ready?

Office 365 and Message Encryption

How do I send an encrypted message using?

Note: At this time, Outlook for Android/iOS do not have the ability to send encrypted messages.

  •  Outlook on the web - browser

      1. Log into Outlook on the web.
      2. Go to Outlook.
      3. Open a new email message or reply to an existing message.
      4. Within the message window, click Protect link located at the top of the message window. The following data will appear in the message window:
        protect action item
      5. The default is set to "Do Not Forward". If you want to change this encryption, use the 'Change Permissions' link.
      6. After you have entered the rest of the message details, send the message - the recipient(s) will receive this message in the encrypted format you selected above.



  •  Outlook for Windows/Mac

      1. Start Outlook.
      2. Confirm you are authenticated correctly - if not, fix this issue before proceeding.
      3. Open a new email message or reply to an existing message.
      4. Go to Options menu.
      5. Click Encrypt button and select the desired encryption you want to use. For Outlook 2019 and Outlook 2016, in an email message, choose Options, select Permissions.

        Important: If this is the first time you are attempting to use this feature, you will need to sign into the rights management server.

        1. Click on "Connect to Right Management Servers and get templates."
        2. If you are prompted to log in, please do so using the credentials of the account you have configured Outlook for. This is usually your NetID account.
        3. Restart Outlook.
        4. Open a new email message or reply to an existing message.
        5. Go to Options menu.
        6. Click Encrypt button and select the desired encryption you want to use.
      6. After you have entered the rest of the message details, send the message - the recipient(s) will receive this message in the encrypted format you selected above.


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