Update actions-for-call-control.md

add preview label

Author: ashwinder

articles/communication-services/how-tos/call-automation/actions-for-call-control.md

@@ -166,7 +166,9 @@ The response provides you with CallConnection object that you can use to take fu
 2. `ParticipantsUpdated` event that contains the latest list of participants in the call.
 ![Sequence diagram for placing an outbound call.](media/make-call-flow.png)
 
-## Connect to a call
+## Connect to a call (in preview)
+[!INCLUDE [Public Preview Disclaimer](../../includes/public-preview-include-document.md)]
+
 Connect action enables your service to establish a connection with an ongoing call and take actions on it. This is useful to manage a Rooms call or when client applications started a 1:1 or group call that Call automation isn't part of. Connection is established using the CallLocator property and can be of types: ServerCallLocator, GroupCallLocator, and RoomCallLocator. These IDs can be found when the call is originally established or a Room is created, and also published as part of [CallStarted](./../../../event-grid/communication-services-voice-video-events.md#microsoftcommunicationcallstarted) event. 
 
 To connect to any 1:1 or group call, use the ServerCallLocator. If you started a call using GroupCallId, you can also use the GroupCallLocator.