The property exists related to Enable Integrated Security property.
The Client Id is an identifier of a Smart Devices application (main SD object). So this property is available only for Smart Devices main objects, and shows the Client Id value of the GAM Application.
Any valid GUID.
Default value: It takes a default value given by GeneXus.
The default value is assigned after the object is created, in the first Build process where the GAM Applications Registration process takes place.
The value of Security Client Id property of a main SD object is different depending on the Environment.