Hi MinhLam,
To get the management VLAN tagged in the Uplink you need to do two things. First, you need to tell the cluster what the switch uplink native VLAN is. This is very easy and can be done as a cluster-wide parameter:
enet-vlan 102
If your management VLAN is tagged and not the native VLAN on the switch you need to define this on per IAP basis:
uplink-vlan 103
For this to work, the VLAN ID in the second command needs to be different than the VLAN ID in the first command.
The second command needs to be issued on every IAP individually. You cannot set it once for all. The only option is to use a management system like AirWave or Central. Here you can define those parameters once and they will get pushed to all devices.
Have a look at my blog post here:
https://www.flomain.de/2017/06/change-the-management-vlan-for-aruba-instant/
I describe the way to use a tagged management VLAN for IAP's.