You can add an ArcGIS web service layer to a scene by providing the URL of the layer.
To add an ArcGIS web service layer, complete the following steps:
-             Click Add Layers  on the Designer  toolbar. on the Designer  toolbar.
- Click ArcGIS web service  to open the Enter Layer URL pane. to open the Enter Layer URL pane.
- Provide a name for the layer in the Layer name text box.
- Provide the URL of the service in the Layer URL text box.
- Optionally, do the following to append custom parameters to requests made to the service:- Under Custom parameters, click Configure custom parameters to open the Custom request parameters pane.
- Click Add parameter.
- Provide the name of the parameter you want to append in the Parameter text box.
- Provide the parameter value in the Value text box.
- Repeat these steps for each parameter you want to append.
- Click Done to apply the changes and return to the Enter Layer URL pane.The specified custom parameters are automatically applied to all requests made to the service. 
 
- Click Add to add the service to the scene.