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As of March 1, 2022, the legacy Barracuda Essentials Security, Compliance, and Complete editions are no longer available for purchase. Only existing customers can renew or add users to these plans.

Following October 30, 2022, the documentation and trainings will no longer be updated and will contain outdated information.

For more information on the latest Email Protection plans, see Barracuda Email Protection.

To update your bookmarks, see the following for the latest documentation and trainings:

Note that MSP customers should continue to follow Barracuda Essentials for MSPs.

How to Deploy the Barracuda Essentials for Email Security Outlook Add-In

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The Barracuda Outlook Add-In supports Microsoft Exchange Server 2013 and higher, Outlook versions 2016, 2019, 2021, Outlook for Office 365, and Outlook Web Access (OWA) running on Windows and Mac OS.

See also Barracuda Essentials for Email Security Outlook Add-In User Guide .

If you are experiencing issues deploying with Microsoft Exchange Server 2013, ensure that TLS 1.2 is enabled in .NET. Refer to this Microsoft article for more information on updating and configuring the .NET Framework to support TLS 1.2.

Use the steps in this article to deploy the Barracuda Essentials for Email Security Outlook Add-In to all users in your Exchange Server. 

The Barracuda Outlook Add-In allows users to perform various functions, including:

  • Send encrypted emails;
  • Mark emails as suspicious and send to Barracuda Networks for further analysis;
  • Provide additional feedback as to why the email should be blocked.

Install Outlook Add-In for all Users

Note that the user interface will vary depending on the Microsoft Exchange version you are using. The instructions below use Office 365 to install the Outlook Add-In. For more information on how to install an add-in for your Exchange version, see the Microsoft article

  1. Log into the Microsoft 365 admin center
  2. Click Settings on the left-hand menu. If you do not see Settings, click Show all first.
  3. Under Settings, click Integrated apps
  4. Click Get Apps.
  5. At the top right of the page, in the search bar, type barracuda. Select Get it now for Barracuda Essentials for Outlook.
  6. Confirm the details on the screen and click Get it now.
  7. In the Add users section, select Entire organization under Assign users. You can also use this section to test with a subset of users first before deploying to your entire organization.
  8. Click next.
  9. Review the permissions and click next.
  10. Click finish deployment.

  11. Wait for the deployment to complete, and then click Done.

    Note that it can take up to six hours for the Barracuda Outlook Add-In to show up in Outlook.

You should now see the Barracuda Outlook Add-In under your Integrated apps section within Microsoft 365.


Remove Add-In

If you need to remove the add-in from your Exchange Server and Outlook/OWA for all users:

  1. Log into the Microsoft 365 admin center
  2. Click Settings on the left-hand menu. If you do not see Settings, click Show all first.
  3. Under Settings, click Integrated apps.
  4. Click Barracuda Essentials for Outlook.
  5. Under Actions, click Remove app.


User has added or removed app but change does not display in OutlookIt may take some time after adding or removing the add-in for the Outlook client or OWA for the Outlook ribbon to update. If users cannot see the change, direct them to either restart the client or refresh the web page.
Message Action is disabledIf a user turns off the reading pane while a message is selected, the Message Action option is disabled. In this instance, Message Actions is disabled on the user's Home ribbon in Outlook but enabled in the detailed view. Direct users to turn on the reading pane and reselect the message.

Error Message: Unable to add encryption client. The attachment path was invalid.

The Barracuda Essentials Outlook Add-In displays this message if your Microsoft Outlook is not installed in the default location. The Barracuda Essentials Outlook Add-In is not able to perform encryption with this configuration.