You want Microsoft Teams to receive notifications whenever work items are updated in an Azure DevOps organization. What action should you take?

To receive Azure DevOps work item update notifications in Microsoft Teams, you should configure a connector within Microsoft Teams. Teams connectors integrate third-party services like Azure DevOps, allowing them to post updates directly into a Teams channel. While Azure DevOps service hooks can send notifications to various endpoints, configuring the connector directly in Teams simplifies the setup for this specific integration and leverages Teams' built-in capabilities for Azure DevOps. Configuring external access in the Teams admin center is for allowing external users to communicate, not for service integrations. Adding a channel in Teams is a prerequisite for receiving notifications but doesn't configure the notification source itself. Installing an extension in Azure DevOps might add functionality within Azure DevOps but isn't the primary method for pushing notifications to Teams.