I went ahead and called Aruba Sales. The sales person didn't have much idea on how it works. She eventually asked another college and said there suposely a way to convert the DELL WIAP to Aruba firmware by Aruba support, but we have to purchase the support agreement for the DELL WIAP in order to talk to them.
I am somewhat skeptical at the moment while I am waiting to hear back from another sales person to send me the quote on how much the support will cost.
I would rather see a KB article or a SKU that specifically show how they can convert the devices using a firmware. Right now...it's just talk.
At the same time, we purchased the devices for 5 years support from Dell. If we purchase the support agreement with Aruba, our dell support will probably voided, which is something our client doesn't want to hear...
We are starting to do testing Unifi on the side because we can't wait forever for the solution and the pricing is more attractive for our clients instead of $400 WIAP, they can get it for $150 Unifi....