In Business Partner Master Data window, a field Send Marketing Document Notification via HUB is available in the General tab. 

To open the Business Partner Master Data window, from the SAP Business One Main Menu, choose Business Partner -> Business Partner Master Data.

The Business Partner Master Data window contains the following fields:

Field Name	Description
Send Marketing Document Notification via HUB	Select this checkbox to send SMS notification automatically to the business partner contact person used in the marketing documents.

Next Step: Automatic SMS Notification based on Print Preferences in Nexmo in the Integration Hub