Northern Trail Outfitters needs to secure an integration with an external Microsoft AzureAPI Gateway.

 The OAuth protocol is a standard way to authorizeaccess to web resources. By configuring a connected app with an authorization endpoint of the API gateway, Salesforce can obtain an access token from the API gateway and use it to invoke the external API securely. This avoids the need to manage certificates oruser credentials for authentication2

References: 1: Data Virtualization Pattern 2: OAuth 2.0 WebServer Authentication Flow