diff --git a/devices/surface-hub/use-room-control-system-with-surface-hub.md b/devices/surface-hub/use-room-control-system-with-surface-hub.md
index d229e05de5..16fd8c71d1 100644
--- a/devices/surface-hub/use-room-control-system-with-surface-hub.md
+++ b/devices/surface-hub/use-room-control-system-with-surface-hub.md
@@ -267,6 +267,9 @@ The current volume level is a range from 0 to 100.
 
 Changes to volume levels can be sent by a room control system, or other system.
 
+>[!NOTE]
+>The Volume command will only control the volume for embedded or Replacement PC mode, not from [Guest sources](connect-and-display-with-surface-hub.md).
+
 <table>
 <colgroup>
 <col width="33%" />