Navigate to Devices -> Controllers and click on +NEW.
You will see the following prompt:
Enter your device key and click VERIFY. If your device key is valid, and the Controller is not already registered to another account, you will see the next prompt:
Enter a custom name for the Controller and choose a Location to which it should be assigned.
Click SAVE and your Controller will be added to your Enterprise account.
Note: In order to successfully add a Controller to Supracontrol Enterprise, the Controller needs to be online, connected and allowed by the network to access the Supracontrol Service.
Supracontrol Controllers have unique keys and cannot be added to multiple client accounts (not to be confused with user accounts which are part of a client account).