diff --git a/libraries/microsoft-agents-a365-notifications/microsoft_agents_a365/notifications/models/agent_notification_activity.py b/libraries/microsoft-agents-a365-notifications/microsoft_agents_a365/notifications/models/agent_notification_activity.py
index a4e51a32..c2de5e77 100644
--- a/libraries/microsoft-agents-a365-notifications/microsoft_agents_a365/notifications/models/agent_notification_activity.py
+++ b/libraries/microsoft-agents-a365-notifications/microsoft_agents_a365/notifications/models/agent_notification_activity.py
@@ -21,7 +21,7 @@ def __init__(self, activity: Activity):
         entities = self.activity.entities or []
         for ent in entities:
             etype = ent.type.lower()
-            payload = getattr(ent, "properties", ent)
+            payload = getattr(ent, "additional_properties", ent)
 
             if etype == NotificationTypes.EMAIL_NOTIFICATION.lower() and self._email is None:
                 try: