Connect With Dynamics CRM Online 2015 Deployment Service

Folks - I am trying to connect to CRM Online 2015 Deployment service using below code. I am getting the server not found error . Any help will be appreciated

 DeploymentServiceClient service = Microsoft.Xrm.Sdk.Deployment.Proxy.ProxyClientHelper.CreateClient(new Uri("disco.crm.dynamics.com/.../Deployment.svc"));

          RetrieveAdvancedSettingsRequest request3 = new RetrieveAdvancedSettingsRequest()
          {
              ConfigurationEntityName = "Deployment",
              ColumnSet = new ColumnSet(false)
          };
            RetrieveAdvancedSettingsResponse response3 = (RetrieveAdvancedSettingsResponse)service.Execute(request3);
            ConfigurationEntity configEntity = response3.Entity;