While doing some work on the AMPRnet hamnet.nu network, we needed to connect a UniFi box to the network, but it could not find the UniFi controller, so i used this command, top fix it. And assign where the controller is. More info here, how to move a UniFi unit to a other Controller. BusyBox v1.11.2 (2015-07-24 03:06:31 PDT) built-in shell (ash) Enter 'help' for a list of built-in commands. BZ.v2.4.1# mca-cli UniFi# set-inform Adoption request sent to ''. 1. please adopt it on the controller 2. issue the set-inform command again 3. will be saved after device is successfully managed