diff --git a/src/bot/meetingUrlParser.ts b/src/bot/meetingUrlParser.ts
index cd8e571..5d48313 100644
--- a/src/bot/meetingUrlParser.ts
+++ b/src/bot/meetingUrlParser.ts
@@ -72,7 +72,18 @@ export async function resolveLaunchUrl(meetingUrl: string, isAuthenticated: bool
 
   try {
     const response = await fetch(trimmed, { redirect: 'follow' });
-    const resolvedUrl = new URL(response.url);
+    let resolvedUrlStr = response.url;
+
+    // For authenticated joins: strip anon=true from everywhere in the URL
+    // Teams redirects embed anon=true in the inner url= parameter (URL-encoded)
+    if (isAuthenticated) {
+      resolvedUrlStr = resolvedUrlStr
+        .replace(/[&?]anon=true/gi, '')
+        .replace(/%26anon%3Dtrue/gi, '')
+        .replace(/%26anon%3Dfalse/gi, '');
+    }
+
+    const resolvedUrl = new URL(resolvedUrlStr);
 
     // Add params to suppress the native app launcher dialog
     resolvedUrl.searchParams.set('msLaunch', 'false');
@@ -84,6 +95,9 @@ export async function resolveLaunchUrl(meetingUrl: string, isAuthenticated: bool
     // Only add anon=true for anonymous joins
     if (!isAuthenticated) {
       resolvedUrl.searchParams.set('anon', 'true');
+    } else {
+      // Ensure anon is removed from outer params too
+      resolvedUrl.searchParams.delete('anon');
     }
 
     return resolvedUrl.toString();