To add to what has been written already, if you need to force clients to a very specific AP, my 'solution' for this normally to create a dedicated SSID and broadcast that only on one radio (2.4/5GHz) on one single AP. Not really manageable at scale, but for exceptions may be acceptable.
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Herman Robers
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If you have urgent issues, always contact your HPE Aruba Networking partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact HPE Aruba Networking TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or HPE Aruba Networking.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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