OK, the survey says....that the client side (those other guys) need to use the process as described in help:
To publish 3D design data to Google Earth
Click Output tab Publish panel Publish to Google Earth At the Command prompt, enter PublishKML.
On the Describe page, specify information about the published drawing. See the Describe page of the wizard.
On the Items page, specify the model space entities that you want to publish. See the Items page of the wizard.
Here they should select the stuff they want you to get when they publish the kmz file