If you are signed into your ArcGIS Online organization account in ArcMap, then the utility services will be listed in the Geocoding toolbar and in ArcCatalog or the Catalog pane you will see them listed under 'Ready-to-use services'. In the image below the utility services show with server icons and a globe and are labeled depending on the type of service. Is this not what you see in ArcMap when you are signed into your organization account?