Yesterday I was playing with Ubiquiti devices and noticed that there is now an option to set management VLAN directly using simple configuration mode.
At first check AirOS version:
Notice that Management VLAN check-box and VLAN ID field are now available when using simple configuration mode.
Configuration visible above will expand when you switch to advanced configuration mode.
It is great that finally management VLAN can be quickly set using web ui so the device configuration is more clear and simple. Nice, really nice.