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Barracuda Email Gateway Defense
formerly Email Security

How to Deploy the Barracuda Outlook Add-In

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This article refers to the Barracuda Essentials Outlook Add-in for customers not currently using Microsoft Office 365.

The latest Barracuda Email Protection Add-In supports Outlook and Outlook Web Access (OWA) for Microsoft Office 365. For setup details, see How to Deploy the Barracuda Email Protection Add-In and Using the Barracuda Email Protection Add-In.


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

See also Barracuda 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.

If you are experiencing issues deploying with Microsoft Exchange Server 2016, refer to this Microsoft article https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/unable-install-add-ins-microsoft-store.

Use the steps in this article to deploy the Barracuda 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 applies to Exchange 2013. For more information on how to install an add-in for your Exchange version, see the Microsoft article https://docs.microsoft.com/en-us/exchange/add-ins-for-outlook-2013-help.

  1. Log into the Exchange Admin Center (EAC) in the Exchange Server.
  2. Navigate to OrganizationAdd-ins.
  3. Click New+.
  4. Select Add from the Office Store.
  5. Select the Barracuda Essentials for Outlook Add-In app, and then click Add.
  6. Click Save.
  7. In the list view, select the Barracuda Essentials for Outlook Add-In, and then click Edit.
  8. Select  Make this add-in available to users in your organization , and then select the option you want.
    • Optional, enabled by default: Allow your users to turn off the add-in.

    • Optional, disabled by default: Allow your users to turn on the add-in.

    • Mandatory, always enabled. Users can't disable this add-in: Do not allow your users to turn off the add-in.

  9. Click Save.

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


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 Exchange Admin Center (EAC) in the Exchange Server.
  2. Navigate to  Organization  >  Add-ins .
  3. In the list view, select Barracuda Essentials for Outlook, and then click Delete Delete icon..

Troubleshooting

IssueSolution
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 Outlook Add-In displays this message if your Microsoft Outlook is not installed in the default location. The Barracuda Outlook Add-In is not able to perform encryption with this configuration.
User cannot load Email Gateway Defense Outlook Add-In from Microsoft when not using Outlook Web Access (OWA)

Install the Email Security Gateway Outlook Add-in and use the encryption option to encrypt mail being sent to Email Gateway Defense. Note that other features in the Email Security Gateway Outlook Add-In will not work as there are no required headers in the mail.

The app couldn't be downloaded in Exchange Server 2016Refer to the Microsoft article: https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/unable-install-add-ins-microsoft-store .