If the Sandbox sample is installed, a Sandbox organization is created by the installer.. Also, a desktop user sandbox is created under the Sandbox organization. sandbox is the password for the user sandbox. You can use this organization to start building the desktop. The Sandbox organization has one main tab, and under this main tab there are two sub tabs. You can start adding portlets into the layout. By logging in as user sandbox, you can view the actual desktop you built using the Desktop Design Tool.
The sandbox organization DN allows you to quickly create a new desktop in the Desktop Design Tool without the need to create a new organization and user separately.