diff --git a/.env.example b/.env.example
index 1dea953..a33b43a 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,6 @@
 # Direct Line (basic, no streaming)
 VITE_TOKEN_ENDPOINT=https://your-environment.api.powerplatform.com/powervirtualagents/botsbyschema/your-agent/directline/token?api-version=2022-03-01-preview
+VITE_DIRECTLINE_DOMAIN=https://europe.directline.botframework.com/v3/directline
 
 # M365 Agents SDK (streaming support) - use with ?m365 URL param
 VITE_ENVIRONMENT_ID=your-environment-id
diff --git a/src/App.jsx b/src/App.jsx
index ff7d6fd..4877c3b 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -13,7 +13,10 @@ function App() {
   useEffect(() => {
     getDirectLineToken()
       .then(token => {
-        setDirectLine(createDirectLine({ token }));
+        setDirectLine(createDirectLine({
+          token,
+          domain: import.meta.env.VITE_DIRECTLINE_DOMAIN || undefined
+        }));
       })
       .catch(err => {
         console.error('Failed to initialize DirectLine:', err);