To properly install the Torque plugin for Azure DevOps, make sure to complete all three steps, as detailed in this article:

• Step 1: Installing
• Step 2: Configuring the Azure DevOps Plugin
• Step 3: Verifying the Configuration and Launching a Sandbox

Prerequisites

• Admin permissions on the plugin’s intended Azure DevOps organization. If you are not the organization’s admin, you may send a request to the admin to install the plugin for you. 
• Azure DevOps organization that will use the Torque plugin

Step 1: Installing

1. Log in to VisualStudio.com and select the organization that will use this plugin.
2. Click Organization settings.
3. From the left pane, select Extensions and then click Browse Marketplace.
4. Search for “torque” and click the Torque plugin.
   
5. Click Get it free.
6. Click Install.

Your plugin is now installed. 

Step 2: Configuring the Azure DevOps Plugin

1. Open your VisualStudio.com project.
   1. Click Project Settings > Service connections.
   2. Click New service connection, select Torque and click Next.
       
      Server Url should already be filled, as illustrated in the above image.
   3. Specify the Torque Long Token: 
      1. In Torque, open the Settings page and click Integrations.
      2. Under the Azure DevOps icon click Connect and then click New Token.
      3. Copy the Torque-generated token.
      4. Return to Azure DevOps Web UI and paste the token into this field.
      5. Click Verify and make sure the connection succeeds.
   4. In the Service Connection Name field, enter "Torque connection".
   5. Click Verify and save.

Step 3: Verifying the Configuration and Launching a Sandbox

To start launching sandboxes from your Azure DevOps pipeline, see Launching a Sandbox from Azure DevOps.