Dear Support
That 2 options to configure the AP to become VC which article I should follow
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-create-Virtual-Controller-redundancy
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-turn-a-WiNG-AP-into-a-virtual-controller
Best Regards
Goh Chee Wong