diff --git a/backend/src/modules/matrix.service.ts b/backend/src/modules/matrix.service.ts
index 103046e..93a2d8b 100644
--- a/backend/src/modules/matrix.service.ts
+++ b/backend/src/modules/matrix.service.ts
@@ -35,6 +35,11 @@ type MatrixUserSession = {
     validUntilMs: number
 }
 
+type MatrixLoginTokenResponse = {
+    login_token: string
+    expires_in_ms: number
+}
+
 type MatrixTenantRoomOptions = {
     key?: string
     name?: string
@@ -1146,6 +1151,40 @@ export function matrixService(server: FastifyInstance) {
         }
     }
 
+    const createElementRoomSession = async (
+        userId: string,
+        tenantId: number | null,
+        options: MatrixTenantRoomOptions = {}
+    ) => {
+        const room = await provisionTenantRoom(userId, tenantId, options)
+        const session = await ensureCurrentUserJoinedRoom(userId, tenantId, {
+            roomId: room.roomId,
+            alias: room.alias,
+        })
+
+        const token = await requestMatrixJson<MatrixLoginTokenResponse>(
+            "/_matrix/client/v1/login/get_token",
+            session.accessToken,
+            {
+                method: "POST",
+                headers: { "Content-Type": "application/json" },
+                body: JSON.stringify({}),
+            }
+        )
+
+        return {
+            roomId: room.roomId,
+            alias: room.alias,
+            key: room.key,
+            name: room.name,
+            matrixUserId: session.matrixUserId,
+            loginToken: token.login_token,
+            expiresInMs: token.expires_in_ms,
+            homeserverUrl: homeserverUrl(),
+            serverName: serverName(),
+        }
+    }
+
     const listTenantCommunicationUsers = async (tenantId: number | null) => {
         const tenant = await getCurrentTenant(tenantId)
         const rows = await server.db
@@ -1302,6 +1341,7 @@ export function matrixService(server: FastifyInstance) {
         getTenantRoomMessages,
         getTenantRoomMembers,
         sendTenantRoomMessage,
+        createElementRoomSession,
         syncTenantRoomMembers,
         getGeneralRoomMessages,
         getGeneralRoomMembers,
diff --git a/backend/src/routes/communication.ts b/backend/src/routes/communication.ts
index 768c28c..e878624 100644
--- a/backend/src/routes/communication.ts
+++ b/backend/src/routes/communication.ts
@@ -125,6 +125,17 @@ export default async function communicationRoutes(server: FastifyInstance) {
         }
     })
 
+    server.post("/communication/matrix/rooms/general/session", async (req, reply) => {
+        try {
+            return await matrix.createElementRoomSession(req.user.user_id, req.user.tenant_id, {
+                key: "allgemein",
+                name: "Allgemeiner Chat",
+            })
+        } catch (err: any) {
+            return handleMatrixError(req, reply, err, "Matrix session failed")
+        }
+    })
+
     server.post("/communication/matrix/rooms/general/members/sync", async (req, reply) => {
         try {
             return await matrix.syncTenantRoomMembers(req.user.user_id, req.user.tenant_id, {
@@ -190,6 +201,18 @@ export default async function communicationRoutes(server: FastifyInstance) {
         }
     })
 
+    server.post("/communication/matrix/rooms/:roomKey/session", async (req, reply) => {
+        try {
+            return await matrix.createElementRoomSession(
+                req.user.user_id,
+                req.user.tenant_id,
+                roomOptionsFromRequest(req)
+            )
+        } catch (err: any) {
+            return handleMatrixError(req, reply, err, "Matrix session failed")
+        }
+    })
+
     server.post("/communication/matrix/rooms/:roomKey/members/sync", async (req, reply) => {
         try {
             return await matrix.syncTenantRoomMembers(
diff --git a/frontend/pages/communication/chat.vue b/frontend/pages/communication/chat.vue
index b7ad205..5c742f9 100644
--- a/frontend/pages/communication/chat.vue
+++ b/frontend/pages/communication/chat.vue
@@ -14,6 +14,8 @@ const matrixMessagesViewport = ref(null)
 const roomCreateOpen = ref(false)
 const matrixCallOpen = ref(false)
 const matrixCallMode = ref("video")
+const matrixCallLoading = ref(false)
+const matrixCallUrl = ref("")
 const roomCreateForm = ref({
   name: "",
   key: "",
@@ -73,6 +75,10 @@ const matrixCallTitle = computed(() =>
   matrixCallMode.value === "audio" ? "Audioanruf" : "Videokonferenz"
 )
 
+const activeMatrixCallUrl = computed(() =>
+  matrixCallUrl.value || activeRoomElementUrl.value
+)
+
 const roomCreateKeyPreview = computed(() =>
   normalizeRoomKey(roomCreateForm.value.key || roomCreateForm.value.name)
 )
@@ -340,7 +346,18 @@ const syncRoomMembers = async () => {
   }
 }
 
-const openMatrixCall = (mode = "video") => {
+const buildElementRoomSessionUrl = (session) => {
+  const roomAddress = session.roomId || session.alias || activeRoomMatrixAddress.value
+  if (!matrixElementUrl.value || !roomAddress) return ""
+
+  const params = new URLSearchParams({
+    loginToken: session.loginToken
+  })
+
+  return `${matrixElementUrl.value}/?${params.toString()}#/room/${encodeURIComponent(roomAddress)}`
+}
+
+const openMatrixCall = async (mode = "video") => {
   if (!canStartMatrixCall.value) {
     toast.add({
       title: "Besprechung kann noch nicht gestartet werden",
@@ -350,7 +367,24 @@ const openMatrixCall = (mode = "video") => {
   }
 
   matrixCallMode.value = mode
+  matrixCallLoading.value = true
   matrixCallOpen.value = true
+
+  try {
+    const session = await $api(`${activeRoomEndpoint.value}/session`, {
+      method: "POST"
+    })
+    matrixCallUrl.value = buildElementRoomSessionUrl(session) || activeRoomElementUrl.value
+  } catch (error) {
+    matrixCallUrl.value = activeRoomElementUrl.value
+    toast.add({
+      title: "Matrix-Anmeldung konnte nicht vorbereitet werden",
+      description: "Der Raum wird ohne automatische Anmeldung geöffnet.",
+      color: "warning"
+    })
+  } finally {
+    matrixCallLoading.value = false
+  }
 }
 
 const loadRoomChat = async ({ silent = false, includeMembers = false } = {}) => {
@@ -619,6 +653,7 @@ onBeforeUnmount(stopMatrixAutoRefresh)
               color="neutral"
               variant="outline"
               aria-label="Audioanruf starten"
+              :loading="matrixCallLoading && matrixCallMode === 'audio'"
               :disabled="!canStartMatrixCall"
               @click="openMatrixCall('audio')"
           />
@@ -627,6 +662,7 @@ onBeforeUnmount(stopMatrixAutoRefresh)
               color="primary"
               variant="soft"
               aria-label="Videokonferenz starten"
+              :loading="matrixCallLoading && matrixCallMode === 'video'"
               :disabled="!canStartMatrixCall"
               @click="openMatrixCall('video')"
           />
@@ -893,6 +929,7 @@ onBeforeUnmount(stopMatrixAutoRefresh)
                 color="neutral"
                 variant="outline"
                 block
+                :loading="matrixCallLoading && matrixCallMode === 'audio'"
                 :disabled="!canStartMatrixCall"
                 @click="openMatrixCall('audio')"
             >
@@ -903,6 +940,7 @@ onBeforeUnmount(stopMatrixAutoRefresh)
                 color="primary"
                 variant="soft"
                 block
+                :loading="matrixCallLoading && matrixCallMode === 'video'"
                 :disabled="!canStartMatrixCall"
                 @click="openMatrixCall('video')"
             >
@@ -940,8 +978,8 @@ onBeforeUnmount(stopMatrixAutoRefresh)
             </div>
             <div class="flex items-center gap-2">
               <UButton
-                  v-if="activeRoomElementUrl"
-                  :to="activeRoomElementUrl"
+                  v-if="activeMatrixCallUrl"
+                  :to="activeMatrixCallUrl"
                   target="_blank"
                   icon="i-heroicons-arrow-top-right-on-square"
                   color="neutral"
@@ -959,10 +997,16 @@ onBeforeUnmount(stopMatrixAutoRefresh)
           </header>
 
           <div class="min-h-0 flex-1 bg-muted">
+            <div
+                v-if="matrixCallLoading"
+                class="flex h-full items-center justify-center text-sm text-muted"
+            >
+              Matrix wird geladen...
+            </div>
             <iframe
-                v-if="canStartMatrixCall"
+                v-else-if="canStartMatrixCall"
                 :key="`${activeRoomKey}-${matrixCallMode}`"
-                :src="activeRoomElementUrl"
+                :src="activeMatrixCallUrl"
                 class="h-full w-full border-0"
                 allow="camera; microphone; display-capture; clipboard-read; clipboard-write; fullscreen; autoplay"
                 referrerpolicy="no-referrer"
diff --git a/matrix/README.md b/matrix/README.md
index 5dc964c..3077166 100644
--- a/matrix/README.md
+++ b/matrix/README.md
@@ -184,3 +184,14 @@ Das Backend stellt geschützte Matrix-Endpunkte unter `/api/communication/matrix
 Für lokale Provisionierung muss `MATRIX_REGISTRATION_SHARED_SECRET` aus `matrix/dev/synapse/homeserver.yaml` in der Backend-Umgebung gesetzt werden. Die lokale Synapse-Konfiguration ist absichtlich nicht versioniert, weil sie Secrets enthält.
 
 In der lokalen Entwicklung liest das Backend dieses Secret als Fallback direkt aus `matrix/dev/synapse/homeserver.yaml`, sofern `NODE_ENV` nicht `production` ist. Auf Servern muss das Secret weiterhin explizit über die Umgebung oder das Secret-Management gesetzt werden.
+
+Für den eingebetteten Element-Login in FEDEO muss in der lokalen Synapse-Konfiguration außerdem der kurzlebige Login-Token-Flow aktiv sein:
+
+```yaml
+login_via_existing_session:
+  enabled: true
+  require_ui_auth: false
+  token_timeout: "5m"
+```
+
+Nach einer Änderung an `matrix/dev/synapse/homeserver.yaml` muss `matrix-dev-synapse` neu gestartet werden.
diff --git a/matrix/dev/element-config.json b/matrix/dev/element-config.json
index f0855bc..ff240ec 100644
--- a/matrix/dev/element-config.json
+++ b/matrix/dev/element-config.json
@@ -5,6 +5,12 @@
       "server_name": "localhost"
     }
   },
+  "org.matrix.msc4143.rtc_foci": [
+    {
+      "type": "livekit",
+      "livekit_service_url": "http://localhost:8081"
+    }
+  ],
   "disable_custom_urls": false,
   "disable_guests": true,
   "brand": "FEDEO Matrix Dev",