Ubiquiti UniFi SWITCH 48 Quick Start Manual page 12

Adopting the UniFi Switch
1. From the UniFi Controller dashboard, click Devices in the
left menu bar.
2. On the Devices screen, locate the UniFi Switch in the list of
devices under the Name/MAC Address column. To adopt
the UniFi Switch, click Adopt.
3. The System LED on the UniFi Switch will turn blue to
confirm that it has been successfully adopted.
To configure PoE settings, proceed to the Configuring PoE
Settings section.