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Encryption Outlook Add-in Settings

The Sophos Outlook Add-in is for Microsoft 365 (formerly Office 365) users only.

You can download and install the add-in for your users' Outlook clients. An add-in is available for the Windows client, and another for both the macOS client and Outlook on the web (OWA).

If you create a secure message policy and set the outbound encryption method to Push encryption or Portal encryption, users can choose to encrypt their emails with the add-in.

To get the Windows add-in, click Download Windows Outlook Add-in.

To get the Mac or Web add-in, click Download Web/Mac Outlook Add-in.

For installation instructions, see Installing the Sophos Outlook add-in for Encryption.

To compose an encrypted email in their Outlook client, users click Encrypt. They can deselect Encrypt if they change their minds.

In web clients and Windows clients, clicking Encrypt flags the email for encryption and adds a header to the email.

In the Mac client, clicking Encrypt tags the message subject for encryption.

Installing the Sophos Outlook add-in for Encryption

The add-in is available for Outlook (Windows or macOS version) and Outlook on the web (formerly OWA) and is compatible with some Microsoft 365 and Exchange environments.

Is my environment compatible with the add-in?

The add-in works for mail accounts in the following environments:

  • Exchange Server 2013 or later (on-premise Exchange).

    Exchange Server 2013 API version 1.4 or older isn't supported.

  • Microsoft 365 Business subscription (Exchange online).

Note

Non-Microsoft mail providers (such as Gmail or other POP/IMAP accounts) aren't supported.

Compatible mail clients

  • Outlook for Windows 2013 and later.
  • Outlook for Mac 2016.
  • Outlook on the web (Microsoft 365 only).

Download for Windows

Windows users must use the msi installer. To download the installer, do as follows:

  1. Go to My Products > General Settings > Encryption Outlook Addin Settings.
  2. Click the Download Windows Outlook Add-in link.
  3. Save this file in a location where you can access it during the deployment step.

Download for Macs or OWA

To turn encryption on or off, go to My Products > General Settings > Encryption Outlook Addin Settings.

Mac or OWA users must use the XML manifest file. To download this, do as follows:

  1. Go to My Products > General Settings > Encryption Outlook Addin Settings.
  2. Click the Download Web/Mac Outlook Add-in link.
  3. Save this file in a location where you can access it during the deployment step.

Deploy the add-in

You use Microsoft's add-in deployment process for deploying the add-in. For each step, we link to appropriate instructions or advice provided by Microsoft.

Note

We recommend that you check the latest information provided by Microsoft on deploying add-ins before proceeding. You should use the instructions provided by Microsoft if there are any differences from the help we provide.

To deploy the add-in, do as follows:

  1. Test whether your users can install the add-in. To do this, follow the instructions in Sideload Outlook add-ins for testing.

    Sideloading is recommended for proof of concept and testing purposes only. It refers to the process of installing the add-in for a user.

  2. If you want to use Microsoft Centralized Deployment, check if centralized deployment of add-ins works in your environment. For more information, see Determine if Centralized Deployment of add-ins works for your organization.

  3. When you're ready to begin centralized deployment of the add-in, follow the instructions in Deploy add-ins in the admin center.
  4. For customers in an on-premise environment without a connection to Microsoft 365, use the Exchange Admin Center to install the add-in for your organization. For more information, see Exchange admin center in Exchange Server.