The network graphs and remote reboot are a part of the billing portal interface. This is the same area that has your invoice/billing information. Log in here. Under the “Services -> My Services” section there will be a list of all your Mac minis. When you view the details of your Mac mini you will see tabs for the Network Graph and Remote Reboot features. Clicking through the tabs will display more information about your Mac mini including the network graphs and the remote reboot functionality.
Posted in: Mac Mini