Go into the Nexmo Dashboard and check your Nexmo application is listed.
Click on your app and then click the External Accounts tab. Facebook Pages that you've linked to your Nexmo account are listed. Click the
Link button to link your application to the desired Facebook Page.
Sending a Facebook message with failoverThe Dispatch API provides the ability to create message workflows with failover to secondary channels. This task looks at using the Dispatch API to send a Facebook message with failover to the SMS channel.