On ArubaOS switches, you configure the VLAN and then attach ports to it either untagged or tagged.
For example if your Office VLAN is VLAN2, and port 1/8, 2/2 through 2/5 must be access ports in that VLAN, and port 1/5 is the (tagged) uplink, the config could be like this:
vlan 2
name "Office"
untagged 1/8,2/2-2/5
tagged 1/5
ip address 10.254.1.1 255.255.255.0
exit
Is that what you are looking for?