Some managed networks require that your wireless device’s MAC Address ( a unique identifying code) be added to a list of devices that have permission to join the network.
To obtain the MAC address of your Google Chromebook…
1: Start the Chromebook up.
2: Click on the Network Icon in the corner of the screen.
3: Click on the name of the network you are connected to.
5: Please provide your system Administrator with this number before you connect to the Managed network for the first time.