https://help.ui.com/hc/en-us/articles/204909754-Remote-Adoption-Layer-3
Use DHCP option 43 on Windows Server to tell UniFi devices how to find the controller
https://mangolassi.it/topic/16657/use-dhcp-option-43-on-windows-server-to-tell-unifi-devices-how-to-find-the-controller
DHCP to Hex Tool
https://tcpip.wtf/en/unifi-l3-adoption-with-dhcp-option-43-on-pfsense-mikrotik-and-others.htm