diff --git a/src/credential/credentialController.ts b/src/credential/credentialController.ts
index 755db83a..16063c25 100644
--- a/src/credential/credentialController.ts
+++ b/src/credential/credentialController.ts
@@ -151,6 +151,7 @@ export class CredentialController {
                     const query = parseQuery(uri);
 
                     resolve({
+                        userId: query.id,
                         userName: query.name,
                         userEmail: query.email,
                         userToken: query['X-OP-BuildUserToken'],
diff --git a/src/extension.ts b/src/extension.ts
index ffeb7bfc..c07148e5 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -108,9 +108,13 @@ export async function activate(context: vscode.ExtensionContext): Promise<Extens
     };
 }
 
-function getTelemetryReporter(context: ExtensionContext, environmentController: EnvironmentController) {
+function getTelemetryReporter(context: ExtensionContext, environmentController: EnvironmentController): TelemetryReporter {
     let key = config.AIKey[environmentController.env];
-    return new TelemetryReporter(EXTENSION_ID, context.extensionVersion, key);
+    let telemetryReporter = new TelemetryReporter(EXTENSION_ID, context.extensionVersion, key);
+    telemetryReporter.setCommonProperty({
+        'common.docsUserId': undefined
+    });
+    return telemetryReporter;
 }
 
 function createQuickPickMenu(correlationId: string, eventStream: EventStream, credentialController: CredentialController, buildController: BuildController) {
diff --git a/src/observers/telemetryObserver.ts b/src/observers/telemetryObserver.ts
index 85e50a1e..afdedcca 100644
--- a/src/observers/telemetryObserver.ts
+++ b/src/observers/telemetryObserver.ts
@@ -11,6 +11,7 @@ export class TelemetryObserver {
 
     public eventHandler = (event: BaseEvent) => {
         switch (event.type) {
+            // Sign
             case EventType.UserSignInTriggered:
                 this.handleUserSignInTriggered(<UserSignInTriggered>event);
                 break;
@@ -23,6 +24,10 @@ export class TelemetryObserver {
             case EventType.UserSignOutCompleted:
                 this.handleUserSignOutCompleted(<UserSignOutCompleted>event);
                 break;
+            case EventType.CredentialReset:
+                this.handleCredentialReset();
+                break;
+            // Build
             case EventType.BuildTriggered:
                 this.handleBuildTriggered(<BuildTriggered>event);
                 break;
@@ -60,7 +65,6 @@ export class TelemetryObserver {
     private handleUserSignInTriggered(event: UserSignInTriggered) {
         this.reporter.sendTelemetryEvent(
             'SignIn.Triggered',
-
             {
                 CorrelationId: event.correlationId
             }
@@ -68,6 +72,14 @@ export class TelemetryObserver {
     }
 
     private handleUserSignInCompleted(event: UserSignInCompleted) {
+        // Set telemetry common property
+        if (event.succeeded) {
+            this.reporter.setCommonProperty({
+                'common.docsUserId': (<UserSignInSucceeded>event).credential.userInfo.userId
+            });
+        }
+
+        // Send telemetry
         let signInType: DocsSignInType;
         let userName: string;
         let userEmail: string;
@@ -94,6 +106,12 @@ export class TelemetryObserver {
         );
     }
 
+    private handleCredentialReset() {
+        this.reporter.setCommonProperty({
+            'common.docsUserId': undefined
+        });
+    }
+
     private handleUserSignOutTriggered(event: UserSignOutTriggered) {
         this.reporter.sendTelemetryEvent(
             'SignOut.Triggered',
diff --git a/src/shared.ts b/src/shared.ts
index fa0ea4eb..c223beff 100644
--- a/src/shared.ts
+++ b/src/shared.ts
@@ -30,6 +30,7 @@ export type DocsSignInType = 'GitHub' | 'Azure DevOps';
 
 export interface UserInfo {
     readonly signType: DocsSignInType;
+    readonly userId: string;
     readonly userName: string;
     readonly userEmail: string;
     readonly userToken: string;
diff --git a/test/unitTests/credential/credentialController.test.ts b/test/unitTests/credential/credentialController.test.ts
index 636e2ac0..8f98f923 100644
--- a/test/unitTests/credential/credentialController.test.ts
+++ b/test/unitTests/credential/credentialController.test.ts
@@ -17,7 +17,7 @@ import { TimeOutError } from '../../../src/error/timeOutError';
 const fakedGitHubCallbackURL = <vscode.Uri>{
     authority: 'ceapex.docs-build',
     path: '/github-authenticate',
-    query: 'name=Fake-User&email=fake@microsoft.com&X-OP-BuildUserToken=fake-token'
+    query: 'id=faked-id&name=Fake-User&email=fake@microsoft.com&X-OP-BuildUserToken=fake-token'
 };
 
 describe('CredentialController', () => {
@@ -170,6 +170,7 @@ describe('CredentialController', () => {
             let credential = credentialController.credential;
             let expectedUserInfo = <UserInfo>{
                 signType: 'GitHub',
+                userId: 'faked-id',
                 userEmail: 'fake@microsoft.com',
                 userName: 'Fake-User',
                 userToken: 'fake-token'
diff --git a/test/unitTests/observers/telemetryObserver.test.ts b/test/unitTests/observers/telemetryObserver.test.ts
index 9fcdfdd7..96f65030 100644
--- a/test/unitTests/observers/telemetryObserver.test.ts
+++ b/test/unitTests/observers/telemetryObserver.test.ts
@@ -1,5 +1,5 @@
 import assert from 'assert';
-import { UserSignInTriggered, UserSignInSucceeded, UserSignInFailed, UserSignOutTriggered, UserSignOutSucceeded, UserSignOutFailed, BuildCanceled, BuildFailed, BuildTriggered, BuildSucceeded, LearnMoreClicked, QuickPickTriggered, QuickPickCommandSelected, DependencyInstallStarted, DependencyInstallCompleted, PackageInstallCompleted, BuildCacheSizeCalculated, PackageInstallAttemptFailed, } from '../../../src/common/loggingEvents';
+import { UserSignInTriggered, UserSignInSucceeded, UserSignInFailed, UserSignOutTriggered, UserSignOutSucceeded, UserSignOutFailed, BuildCanceled, BuildFailed, BuildTriggered, BuildSucceeded, LearnMoreClicked, QuickPickTriggered, QuickPickCommandSelected, DependencyInstallStarted, DependencyInstallCompleted, PackageInstallCompleted, BuildCacheSizeCalculated, PackageInstallAttemptFailed, CredentialReset, } from '../../../src/common/loggingEvents';
 import { TelemetryObserver } from '../../../src/observers/telemetryObserver';
 import { DocsError } from '../../../src/error/docsError';
 import { ErrorCode } from '../../../src/error/errorCode';
@@ -17,8 +17,12 @@ describe('TelemetryObserver', () => {
     let sentEventName: string;
     let sentEventProperties: any;
     let sentEventMeasurements: any;
+    let commonProperty: { [key: string]: string };
 
     let telemetryReporter = <TelemetryReporter>{
+        setCommonProperty(properties: { [key: string]: string }): void {
+            commonProperty = properties;
+        },
         sendTelemetryEvent(eventName: string, properties?: {
             [key: string]: string;
         }, measurements?: {
@@ -50,6 +54,8 @@ describe('TelemetryObserver', () => {
         sentEventName = undefined;
         sentEventProperties = undefined;
         sentEventMeasurements = undefined;
+
+        commonProperty = {};
     });
 
     // Sign
@@ -76,6 +82,9 @@ describe('TelemetryObserver', () => {
                 UserEmail: 'fake@microsoft.com',
                 ErrorCode: undefined,
             });
+            assert.deepStrictEqual(commonProperty, {
+                'common.docsUserId': 'faked-id'
+            });
         });
 
         it('UserSignInFailed', () => {
@@ -106,6 +115,20 @@ describe('TelemetryObserver', () => {
                 UserEmail: 'fake@microsoft.com',
                 ErrorCode: undefined
             });
+            assert.deepStrictEqual(commonProperty, {
+                'common.docsUserId': 'faked-id'
+            });
+        });
+    });
+
+    it(`UserSignOutTriggered: 'SignOut.Triggered' event should be sent`, () => {
+        let event = new CredentialReset();
+        commonProperty = {
+            'common.docsUserId': 'faked-id'
+        };
+        observer.eventHandler(event);
+        assert.deepStrictEqual(commonProperty, {
+            'common.docsUserId': undefined
         });
     });
 
diff --git a/test/utils/faker.ts b/test/utils/faker.ts
index 7fe701ee..1cf39ff2 100644
--- a/test/utils/faker.ts
+++ b/test/utils/faker.ts
@@ -37,6 +37,7 @@ export const fakedCredential = <Credential>{
     signInStatus: 'SignedIn',
     userInfo: {
         signType: 'GitHub',
+        userId: 'faked-id',
         userEmail: 'fake@microsoft.com',
         userName: 'Faked User',
         userToken: 'faked-token'