I asked almost the exact same question in the Aruba OS area and didn't really get a clear answer.
The question I have revolves around this particular line in the Guest Web Login configuration:
If I have a single MC, it works fine and logs in. The problems arise when I add my second MC. I have them together in a cluster and running VRRP as well.
Which CN am I putting in there? In 6.x I would put in the CN of the master, as that makes sense. In this case I have no idea what is supposed to go in there when there are mulitple controllers.
Thanks.