You'd find the release note in the download area in the 6.3 directory.
I haven't found the new manual so it might not be ready yet.
The whole thing wasn't that complicated to setup in my lab environment.
Still no clue how that should work in a real network as bridge@EWC traffic is mirrored with the tag (as per Paulo's post
https://community.extremenetworks.com/extreme/topics/purview-integration-wireless-controller-9-21 )
I don't see how I'd connect the controller mirror port to my core as the same frame would get tx from different ports = ESA port with bridge@EWC topology & mirror port with the same frame = possible loop ???
As that wasn't clear to me I've installed another NIC in my VM Netsight and connected it with a patchcable to the mirror port to bypass my core switch.
Purview is up&running since noon and now I've proof that my colleagues spend too much time on Youtube videos
🙂