Using a Google Apps Marketplace App installed from the Chrome Web Store with a full Drive scope works fine except when I unchecked the "Allow users to install Google Drive Apps" in Drive settings then I get this error with all Drive interactions:
{ "code" : 403, "errors" : [ { "domain" : "global", "message" : "Forbidden", "reason" : "forbidden" } ], "message" : "Forbidden" } This makes sense but reading this announcement I thought installing the App would be white listed:
"With today’s launch, Marketplace applications deployed by admins will be able to integrate with Google Drive for users who are provided with the app, even if this Admin Console setting is disabled. In essence, admins can now whitelist the Drive applications that their users can install."