Gets or sets the frequency, in minutes, that the ExternalMenu object will refresh itself.

public Int32 ExternalInterval

Description	Range	Type
Frequency, in minutes, that the ExternalMenu object will refresh itself.	>=0	Int32

In case no value is set the node will not be a part of the external menu xml representation.

ExternalMenu externalMenu = new ExternalMenu();
externalMenu.ExternalInterval = 60;