diff --git a/Composer/packages/server/src/services/telemetry.ts b/Composer/packages/server/src/services/telemetry.ts
index 785005fd97..eaf9471a86 100644
--- a/Composer/packages/server/src/services/telemetry.ts
+++ b/Composer/packages/server/src/services/telemetry.ts
@@ -39,7 +39,7 @@ if (instrumentationKey) {
   // do not collect the user's machine name
   AppInsights.defaultClient.context.tags[AppInsights.defaultClient.context.keys.cloudRoleInstance] = '';
   AppInsights.defaultClient.addTelemetryProcessor((envelope: AppInsights.Contracts.Envelope, context): boolean => {
-    const { sessionId, telemetry, composerVersion } = getTelemetryContext();
+    const { sessionId, telemetry, composerVersion, userId } = getTelemetryContext();
 
     if (!telemetry?.allowDataCollection) {
       return false;
@@ -49,6 +49,9 @@ if (instrumentationKey) {
     // Add session id
     envelope.tags[AppInsights.defaultClient.context.keys.sessionId] = sessionId;
 
+    // Add truncated user id
+    envelope.tags[AppInsights.defaultClient.context.keys.userId] = userId?.slice(0, Math.floor(userId.length * 0.8));
+
     // Remove PII from url
     if (envelope.data.baseType === 'RequestData' && data.baseData.url.match(/\/\d+.\d+/i)) {
       if (typeof data.baseData.url === 'string') {