Sorry, I didn't mean to confuse -
What I am trying to do is use AMS + iLO for discoveries and these are all Windows machines. The ESX hosts actually worked very nicely. I updated all the Windows machines myself with AMS v10 and most (not all) have the full agents as well (part of the standard build). I don't particularly care about the full agents going forward as I want this all to work with just AMS.
So.. these are blades running Windows with AMS v10. I could update the agents but I don't want to have to do that - however perhaps there is some issue there preventing this from working (maybe just remove agents on a server to see what happens).