I'm not very familiar with CustomUI - but since I've redeployed the appliances from clean the only thing that remains in common is the vCenter DB. None of the hosts are marked as maintenance mode in the vSphere Web Client/Client and if I go into CustomUI and choose, Environment>Environment Overview I can see all of the objects within the Inventory (all marked with a 100 health score). All have got a green mark against the Collection column, and the Data receiving icon. When I tried this earlier today using the original appliance almost all of the items were marked with a blue question mark. I would be tempted to leave it and see what happens next, but we have already started receiving data for a smaller subordinate datacentre and nothing at all for any datacentre with a cluster or larger configuration present.
Update: Actually, it's a very long list of items in the CustomUI view - and all of the entries which are not showing up in the vCOPs are marked with a blue question mark.
Message was edited by: swalker_LST