Application Insights overriding default endpoints

<ApplicationInsights>
  ...
  <TelemetryModules>
    <Add Type="Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.QuickPulse.QuickPulseTelemetryModule, Microsoft.AI.PerfCounterCollector">
      <QuickPulseServiceEndpoint>Custom_QuickPulse_Endpoint_Address</QuickPulseServiceEndpoint>
    </Add>
  </TelemetryModules>
    ...
  <TelemetryChannel>
     <EndpointAddress>TelemetryChannel_Endpoint_Address</EndpointAddress>
  </TelemetryChannel>
  ...
  <ApplicationIdProvider Type="Microsoft.ApplicationInsights.Extensibility.Implementation.ApplicationId.ApplicationInsightsApplicationIdProvider, Microsoft.ApplicationInsights">
    <ProfileQueryEndpoint>Profile_Query_Endpoint_address</ProfileQueryEndpoint>
  </ApplicationIdProvider>
  ...
</ApplicationInsights>

Modify the appsettings.json file in your project as follows to adjust the main endpoint:

"ApplicationInsights": {
    "InstrumentationKey": "instrumentationkey",
    "TelemetryChannel": {
      "EndpointAddress": "TelemetryChannel_Endpoint_Address"
    }
  }

The values for Live Metrics and the Profile Query Endpoint can only be set via code. To override the default values for all endpoint values via code, make the following changes in the ConfigureServices method of the Startup.cs file:

using Microsoft.ApplicationInsights.Extensibility.Implementation.ApplicationId;
using Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.QuickPulse; //Place at top of Startup.cs file

   services.ConfigureTelemetryModule<QuickPulseTelemetryModule>((module, o) => module.QuickPulseServiceEndpoint="QuickPulse_Endpoint_Address");

   services.AddSingleton<IApplicationIdProvider, ApplicationInsightsApplicationIdProvider>(_ => new ApplicationInsightsApplicationIdProvider() { ProfileQueryEndpoint = "Profile_Query_Endpoint_address" });

   services.AddSingleton<ITelemetryChannel>(_ => new ServerTelemetryChannel() { EndpointAddress = "TelemetryChannel_Endpoint_Address" });

    //Place in the ConfigureServices method. Place this before services.AddApplicationInsightsTelemetry("instrumentation key"); if it's present

For Azure Functions it is now recommended to use connection strings set in the Function's Application settings. To access Application settings for your function from within the functions pane select Settings > Configuration > Application settings.

Name: APPLICATIONINSIGHTS_CONNECTION_STRING Value: Connection String Value

Modify the applicationinsights.xml file to change the default endpoint address.

<?xml version="1.0" encoding="utf-8"?>
<ApplicationInsights xmlns="http://schemas.microsoft.com/ApplicationInsights/2013/Settings">
  <InstrumentationKey>ffffeeee-dddd-cccc-bbbb-aaaa99998888</InstrumentationKey>
  <TelemetryModules>
    <Add type="com.microsoft.applicationinsights.web.extensibility.modules.WebRequestTrackingTelemetryModule"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.modules.WebSessionTrackingTelemetryModule"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.modules.WebUserTrackingTelemetryModule"/>
  </TelemetryModules>
  <TelemetryInitializers>
    <Add type="com.microsoft.applicationinsights.web.extensibility.initializers.WebOperationIdTelemetryInitializer"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.initializers.WebOperationNameTelemetryInitializer"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.initializers.WebSessionTelemetryInitializer"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.initializers.WebUserTelemetryInitializer"/>
    <Add type="com.microsoft.applicationinsights.web.extensibility.initializers.WebUserAgentTelemetryInitializer"/>
  </TelemetryInitializers>
  <!--Add the following Channel value to modify the Endpoint address-->
  <Channel type="com.microsoft.applicationinsights.channel.concrete.inprocess.InProcessTelemetryChannel">
  <EndpointAddress>TelemetryChannel_Endpoint_Address</EndpointAddress>
  </Channel>
</ApplicationInsights>

Spring Boot

Modify the application.properties file and add:

azure.application-insights.channel.in-process.endpoint-address= TelemetryChannel_Endpoint_Address

var appInsights = require("applicationinsights");
appInsights.setup('INSTRUMENTATION_KEY');
appInsights.defaultClient.config.endpointUrl = "TelemetryChannel_Endpoint_Address"; // ingestion
appInsights.defaultClient.config.profileQueryEndpoint = "Profile_Query_Endpoint_address"; // appid/profile lookup
appInsights.defaultClient.config.quickPulseHost = "QuickPulse_Endpoint_Address"; //live metrics
appInsights.Configuration.start();

The endpoints can also be configured through environment variables:

Instrumentation Key: "APPINSIGHTS_INSTRUMENTATIONKEY"
Profile Endpoint: "Profile_Query_Endpoint_address"
Live Metrics Endpoint: "QuickPulse_Endpoint_Address"

<script type="text/javascript">
    var sdkInstance="appInsightsSDK";window[sdkInstance]="appInsights";var aiName=window[sdkInstance],aisdk=window[aiName]||function(e){function n(e){t[e]=function(){var n=arguments;t.queue.push(function(){t[e].apply(t,n)})}}var t={config:e};t.initialize=!0;var i=document,a=window;setTimeout(function(){var n=i.createElement("script");n.src=e.url||"https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js",i.getElementsByTagName("script")[0].parentNode.appendChild(n)});try{t.cookie=i.cookie}catch(e){}t.queue=[],t.version=2;for(var r=["Event","PageView","Exception","Trace","DependencyData","Metric","PageViewPerformance"];r.length;)n("track"+r.pop());n("startTrackPage"),n("stopTrackPage");var s="Track"+r[0];if(n("start"+s),n("stop"+s),n("setAuthenticatedUserContext"),n("clearAuthenticatedUserContext"),n("flush"),!(!0===e.disableExceptionTracking||e.extensionConfig&&e.extensionConfig.ApplicationInsightsAnalytics&&!0===e.extensionConfig.ApplicationInsightsAnalytics.disableExceptionTracking)){n("_"+(r="onerror"));var o=a[r];a[r]=function(e,n,i,a,s){var c=o&&o(e,n,i,a,s);return!0!==c&&t["_"+r]({message:e,url:n,lineNumber:i,columnNumber:a,error:s}),c},e.autoExceptionInstrumented=!0}return t}(
    {
      instrumentationKey:"INSTRUMENTATION_KEY",
      endpointUrl: "TelemetryChannel_Endpoint_Address"
    }
    );window[aiName]=aisdk,aisdk.queue&&0===aisdk.queue.length&&aisdk.trackPageView({});
</script>

For guidance on modifying the ingestion endpoint for the opencensus-python SDK consult the opencensus-python repo.