Direct contact tenant admin and user
As depicted in the figure, the on-site user provides the activation key to the Tenant Administrator (by telephone or modern means, such as a smart phone app). The Tenant Administrator activates the new controller and connects the user to the controller using "Add user".
The Tenant Administrator assigns the user on site, for example, the role of owner (i.e. the privilege to "Administer plant settings) for the users to independently activate new plants in the future.

Short characteristics
- Central plant management
- Autonomous user on site