diff --git a/channels/applicationinsights-channel-js/Tests/Unit/src/Sender.tests.ts b/channels/applicationinsights-channel-js/Tests/Unit/src/Sender.tests.ts
index 1791cba67..4ebd8e378 100644
--- a/channels/applicationinsights-channel-js/Tests/Unit/src/Sender.tests.ts
+++ b/channels/applicationinsights-channel-js/Tests/Unit/src/Sender.tests.ts
@@ -167,6 +167,34 @@ export class SenderTests extends AITestClass {
             }
         });
 
+        this.testCase({
+            name: "Channel Config: Endpoint Url can be set from root dynamically",
+            useFakeTimers: true,
+            test: () => {
+                let core = new AppInsightsCore();
+                let id = this._sender.identifier;
+                let coreConfig = {
+                    instrumentationKey: "abc",
+                    extensionConfig: {
+                        [id]: {
+                        
+                        }
+                    },
+                    endpointUrl: "test"
+                }
+                core.initialize(coreConfig, [this._sender]);
+
+                let senderConfig = this._sender._senderConfig;
+                QUnit.assert.equal(senderConfig.endpointUrl, "test", "Channel default endpoint url config is set from root");
+              
+                //check dynamic config
+                core.config.endpointUrl = "test1";
+                this.clock.tick(1);
+                let curSenderConfig = this._sender._senderConfig;
+                QUnit.assert.equal(curSenderConfig.endpointUrl,"test1", "Channel endpoint config is dynamically changed");
+            }
+        });
+
         this.testCaseAsync({
             name: "Channel Init: init with promise",
             stepDelay: 100,
diff --git a/channels/applicationinsights-channel-js/src/Sender.ts b/channels/applicationinsights-channel-js/src/Sender.ts
index 6861c875c..b5086a06f 100644
--- a/channels/applicationinsights-channel-js/src/Sender.ts
+++ b/channels/applicationinsights-channel-js/src/Sender.ts
@@ -268,9 +268,19 @@ export class Sender extends BaseTelemetryPlugin implements IChannelControls {
                     let ctx = createProcessTelemetryContext(null, config, core);
                     // getExtCfg only finds undefined values from core
                     let senderConfig = ctx.getExtCfg(identifier, defaultAppInsightsChannelConfig);
-                    if(isPromiseLike(senderConfig.endpointUrl)) {
-                        // if it is promise, means the endpoint url is from core.endpointurl
-                        senderConfig.endpointUrl = config.endpointUrl as any;
+
+                    let curExtUrl = senderConfig.endpointUrl;
+                    // if it is not inital change (_endpointUrl has value)
+                    // if current sender endpoint url is not changed directly
+                    // means ExtCfg is not changed directly
+                    // then we need to monitor endpoint url changes from core
+                    if (_endpointUrl && curExtUrl === _endpointUrl) {
+                        let coreUrl = config.endpointUrl as any;
+                        // if core endpoint url is changed
+                        if (coreUrl && coreUrl !== curExtUrl) {
+                            // and endpoint promise changes is handled by this as well
+                            senderConfig.endpointUrl = coreUrl;
+                        }
                     }
 
                     if(isPromiseLike(senderConfig.instrumentationKey)) {