METHOD_MessageAck
    This method sends an acknowledgement (delivery receipt) to 
BEMS
 for the message that was received by the BlackBerry Connect
 app.The following table describes the parameters that you can include in this method.
| Parameter | Type | Required | Description | 
|---|---|---|---|
| messageId | String | √ | This parameter specifies the message ID which the  BlackBerry Connectapp has obtained from the MessageReceived event. | 
| status | String | √ | This parameter specifies a status of 'delivered.'  Delivered is currently the only supported status option. | 
| dependencies | String | — | This parameter specifies the other methods that this method is dependent on. It specifies the comma delimited dependent request ids. | 
| reconnect | String | — | This parameter specifies that the  BlackBerry Connectapp re-establish the existing session. For example, if BlackBerry Connectgoes to the background, when it comes to the foreground the same session is continued. | 
BEMS response and notification
      BEMS
 response and notificationThe following table describes the parameters that 
    
BEMS
 returns and the notification that is sent to the BlackBerry Connect
 app when the the acknowledgement is sent.
        
  | Parameter | Type | Description | 
|---|---|---|
| state | String | This parameter specifies the state of the request to  BEMS(for example, Processing or Complete). | 
| method | String | This parameter specifies the method invocation name (for example, MessageAck). | 
Example code 
      The following example sends a request to 
BEMS
 to send an acknowledge (for example, delivery receipt) for a received message.{ "method":"MessageAck", "params": { "messageId":"1", "status":"delivered" }, "id":"c5", "jsonrpc":"2.0" }
If the request is successful, 
BEMS
 sends the following response to the BlackBerry Connect
 app and processes the request.{ "id":"c5", "error":null, "result": { "data": { "method":"MessageAck", "state":"PROCESSING" } }, "jsonrpc":"2.0", "background":false }
If there are no errors, 
BEMS
 sends the following notification to the BlackBerry Connect
 app that acknowledges the receipt of the message.{ "id":"c5", "sequence": 1018561500000012, "result": { "data": { "method":"MessageAck", "state":"COMPLETE" }, "jsonrpc":"2.0" }