diff --git a/apps/edr-freight-web/backoffice/src/App.tsx b/apps/edr-freight-web/backoffice/src/App.tsx
index 8eaf0d4e1..bd8eccc61 100644
--- a/apps/edr-freight-web/backoffice/src/App.tsx
+++ b/apps/edr-freight-web/backoffice/src/App.tsx
@@ -24,6 +24,7 @@ import BookingContractPage from "./pages/bookings/BookingContractPage";
 import BookingRequestDetailPage from "./pages/bookings/BookingRequestDetailPage";
 import BookingRequestsPage from "./pages/bookings/BookingRequestsPage";
 import NewBookingPage from "./pages/bookings/NewBookingPage";
+import UserManagementHostPage from "./pages/dashboard/user-management/UserManagementHostPage";
 import DemoUser1Page from "./pages/dashboard/demo/DemoUser1Page";
 import DemoUser2Page from "./pages/dashboard/demo/DemoUser2Page";
 import OverviewPage from "./pages/dashboard/OverviewPage";
@@ -298,6 +299,10 @@ const App = () => {
           <Route path="containers" element={<FleetResourcePage />} />
           <Route path="cargoes" element={<FleetResourcePage />} />
 
+          {/* iframe-based user management module */}
+          <Route path="um/*" element={<UserManagementHostPage />} />
+
+          {/* Legacy embedded user management routes */}
           <Route path="user-management" element={<UserManagementPage />} />
           <Route path="user-management/users" element={<UsersPage />} />
           <Route path="user-management/position-types" element={<PositionTypesPage />} />
diff --git a/apps/edr-freight-web/backoffice/src/auth/tokenManager.ts b/apps/edr-freight-web/backoffice/src/auth/tokenManager.ts
new file mode 100644
index 000000000..3ee581eaf
--- /dev/null
+++ b/apps/edr-freight-web/backoffice/src/auth/tokenManager.ts
@@ -0,0 +1,117 @@
+export interface TokenMessage {
+  type: 'UM_AUTH_TOKEN';
+  token: string;
+  refreshToken: string;
+}
+
+/**
+ * Manages authentication tokens received from parent window (host)
+ * Used by iframe modules to receive and store auth tokens
+ */
+class TokenManager {
+  private token: string | null = null;
+  private refreshToken: string | null = null;
+  private tokenResolve: ((token: string) => void) | null = null;
+  private tokenPromise: Promise<string>;
+  private isFramed: boolean;
+
+  constructor() {
+    // Check if we're running in an iframe
+    this.isFramed = window.self !== window.top;
+
+    // Create a promise that resolves when token is received
+    this.tokenPromise = new Promise((resolve) => {
+      this.tokenResolve = resolve;
+    });
+
+    if (this.isFramed) {
+      this.setupMessageListener();
+
+      // Request token after 2 seconds if not received
+      setTimeout(() => {
+        if (!this.token) {
+          this.requestTokenFromHost();
+        }
+      }, 2000);
+    }
+  }
+
+  private setupMessageListener() {
+    window.addEventListener('message', (event) => {
+      // Security: Only accept from parent window
+      if (event.source !== window.parent) {
+        return;
+      }
+
+      const data = event.data as TokenMessage | undefined;
+
+      if (data?.type === 'UM_AUTH_TOKEN') {
+        this.token = data.token;
+        this.refreshToken = data.refreshToken;
+
+        // Store in localStorage for persistence
+        localStorage.setItem('um_auth_token', data.token);
+        localStorage.setItem('um_refresh_token', data.refreshToken);
+
+        console.log('✅ Token received from host');
+
+        // Resolve the promise
+        if (this.tokenResolve) {
+          this.tokenResolve(data.token);
+        }
+      }
+    });
+  }
+
+  private requestTokenFromHost() {
+    console.log('📤 Requesting token from host...');
+    window.parent.postMessage(
+      { type: 'UM_REQUEST_AUTH' },
+      window.location.origin
+    );
+  }
+
+  /**
+   * Get token - waits for it if not yet received
+   */
+  async getToken(): Promise<string> {
+    if (this.token) {
+      return this.token;
+    }
+
+    // Check localStorage as fallback
+    const stored = localStorage.getItem('um_auth_token');
+    if (stored) {
+      this.token = stored;
+      return stored;
+    }
+
+    // Wait for token to arrive from parent
+    return this.tokenPromise;
+  }
+
+  /**
+   * Get token synchronously (returns null if not available)
+   */
+  getTokenSync(): string | null {
+    return this.token || localStorage.getItem('um_auth_token');
+  }
+
+  getRefreshToken(): string | null {
+    return this.refreshToken || localStorage.getItem('um_refresh_token');
+  }
+
+  clearTokens() {
+    this.token = null;
+    this.refreshToken = null;
+    localStorage.removeItem('um_auth_token');
+    localStorage.removeItem('um_refresh_token');
+  }
+
+  isInFrame(): boolean {
+    return this.isFramed;
+  }
+}
+
+// Export singleton instance
+export const tokenManager = new TokenManager();
diff --git a/apps/edr-freight-web/backoffice/src/pages/dashboard/user-management/UserManagementHostPage.tsx b/apps/edr-freight-web/backoffice/src/pages/dashboard/user-management/UserManagementHostPage.tsx
new file mode 100644
index 000000000..526667a31
--- /dev/null
+++ b/apps/edr-freight-web/backoffice/src/pages/dashboard/user-management/UserManagementHostPage.tsx
@@ -0,0 +1,113 @@
+import { useEffect, useRef, useState } from 'react';
+import { useNavigate, useLocation } from 'react-router-dom';
+import { getCookie } from '@/auth/cookies';
+
+function readToken(): string | null {
+  return getCookie('auth-token') ?? null;
+}
+
+function readRefreshToken(): string | null {
+  return getCookie('refresh-token') ?? null;
+}
+
+export default function UserManagementHostPage() {
+  const navigate = useNavigate();
+  const location = useLocation();
+  const iframeRef = useRef<HTMLIFrameElement>(null);
+
+  const mountBase = (
+    (import.meta.env.VITE_USER_MANAGEMENT_BASE as string | undefined) ?? '/_um'
+  ).replace(/\/$/, '');
+
+  const moduleOrigin = window.location.origin;
+
+  const [iframeSrc] = useState(() => {
+    const sub = location.pathname.replace(/^\/(?:dashboard\/)?um(?=\/|$)/, '');
+    return mountBase + (sub || '/') + location.search;
+  });
+
+  // ✅ Send token when iframe loads
+  const handleIframeLoad = () => {
+    const token = readToken();
+    const refreshToken = readRefreshToken();
+    const target = iframeRef.current?.contentWindow;
+
+    if (!token) {
+      console.warn('⚠️ No authentication token found');
+      return;
+    }
+
+    if (!target) {
+      console.warn('⚠️ No iframe reference');
+      return;
+    }
+
+    target.postMessage(
+      {
+        type: 'UM_AUTH_TOKEN',
+        token,
+        refreshToken,
+      },
+      moduleOrigin
+    );
+
+    console.log('✅ Token sent to iframe module');
+  };
+
+  // ✅ Listen for messages from iframe
+  useEffect(() => {
+    const onMessage = (event: MessageEvent) => {
+      // Security: Only accept from same origin
+      if (event.origin !== moduleOrigin) {
+        console.warn('🚫 Blocked message from different origin:', event.origin);
+        return;
+      }
+
+      const data = event.data as { type?: string; path?: string } | undefined;
+      if (!data) return;
+
+      // Handle auth request (if module asks for token again)
+      if (data.type === 'UM_REQUEST_AUTH') {
+        const token = readToken();
+        const refreshToken = readRefreshToken();
+        const target = iframeRef.current?.contentWindow;
+
+        if (token && target) {
+          target.postMessage(
+            {
+              type: 'UM_AUTH_TOKEN',
+              token,
+              refreshToken,
+            },
+            moduleOrigin
+          );
+          console.log('✅ Token resent to iframe (on request)');
+        }
+        return;
+      }
+
+      // Handle route synchronization
+      if (data.type === 'UM_ROUTE_CHANGED' && typeof data.path === 'string') {
+        const target = '/dashboard/um' + data.path;
+        if (window.location.pathname + window.location.search !== target) {
+          navigate(target, { replace: true });
+        }
+      }
+    };
+
+    window.addEventListener('message', onMessage);
+    return () => window.removeEventListener('message', onMessage);
+  }, [moduleOrigin, navigate]);
+
+  return (
+    <div style={{ position: 'fixed', inset: 0 }}>
+      <iframe
+        ref={iframeRef}
+        title="User Management"
+        src={iframeSrc}
+        onLoad={handleIframeLoad}
+        style={{ width: '100%', height: '100%', border: 0, display: 'block' }}
+      />
+    </div>
+  );
+}