You can create 3 Virtual APs, 1 SSID and 3 AP groups if you are using Centralized controller.
Example
SSID Profile "Employee"
essid "Corp"
Virtual AP "Employee_Site-1"
vlan 10
ssid Employee
Virtual AP "Employee_Site-2"
vlan 20
ssid Employee
Virtual AP "Employee_Site-3"
vlan 30
ssid Employee
AP Group Site-1
virtual ap "Employee_Site-1"
AP Group Site-2
virtual ap "Employee_Site-2"
AP Group Site-3
virtual ap "Employee_Site-3"
https://www.arubanetworks.com/techdocs/ArubaOS_80_Web_Help/Content/ArubaFrameStyles/VirtualAPs/Configuring_VAP_Profile.htm
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Harendra
ACEX165
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