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Encryption Outlook Add-in

The Sophos Outlook Add-in is supported for Microsoft 365 users only.

The Sophos Outlook Add-in allows Microsoft 365 users to encrypt emails directly from Outlook with a single click.

To get the add-in, click Download Outlook Add-in. You can then install it for your users' Outlook clients. For installation instructions, see Installing the Sophos Outlook add-in for Encryption.

If you create a Secure Message policy and set the outbound encryption method to Push Encryption or Portal Encryption, users can encrypt their emails using the Outlook add-in.

To compose an encrypted email, users click Encrypt in Outlook. They can deselect it at any time before sending.

Installing the Sophos Outlook add-in for Encryption

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

Is my environment compatible with the add-in?

The add-in is compatible with the following mail environments:

  • Exchange Server 2013 or later (on-premises Exchange)

    Exchange Server 2013 API version 1.4 or earlier 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 the add-in

To download the add-in, do as follows:

  1. Click the General Settings icon General Settings icon., scroll down to the Email Security section, and click Encryption.

    Tip

    Alternatively, go to My Products > Email Security > Settings. Under Email Security, click Encryption.

  2. Click the Download Outlook Add-in link.

  3. Save this file in a location where you can access it during the deployment step.

Deploy the add-in

Use Microsoft's deployment process to deploy the add-in. For each step, we link to Microsoft's instructions.

Note

We recommend that you always check the latest Microsoft documentation before proceeding. You must 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 users can install the add-in by sideloading it. For instructions, see Sideload Outlook add-ins for testing.

    Note

    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 whether centralized deployment works in your environment. For more information, see Determine if centralized deployment of Office Add-ins works for your organization.

  3. When you're ready to begin centralized deployment, follow the instructions in the Microsoft documentation. See Deploy add-ins in the Microsoft 365 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.