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Install the Sophos Outlook add-in

Install the Sophos Outlook add-in so that your users can report suspicious mail.

The add-in simplifies the process your users have to follow to report suspicious mail.

To install the add-in, you need to do the following steps:

  1. Configure the add-in.
  2. Download the XML manifest.
  3. Deploy the add-in to users. This stage uses Microsoft's add-in deployment process.

Configure the add-in

Before deploying the add-in to users, you must set up one or more mailboxes where reports of suspicious messages are delivered.

To add a mailbox, do as follows:

  1. Go to Phish Threat > Settings > Report Message Add-in for Outlook.
  2. Click Add mailbox to add a new mailbox.

Download the XML manifest

When you've configured the mailboxes, you must download the XML manifest.

To download the manifest, do as follows:

  1. Go to Phish Threat > Settings > Report Message Add-in for Outlook.
  2. Click the Download XML Manifest 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. The steps in this stage link to appropriate instructions or advice provided by Microsoft for each step.

You may find this article helpful for the sideloading and centralized deployments steps. See How to deploy the Phish Threat Outlook Plugin.


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 users can install the add-in. To do this, follow the instructions in Sideloading installation instructions.

    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. Check if Office 365 centralized deployment of add-ins works in your environment. See Determine if centralized deployment of add-ins works for your Office 365 organization.

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

If the add-in won't install on endpoint computers, or it doesn't appear in the list of available add-ins, you must install the latest Microsoft Office updates.

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