Hi yes they don't rediscover themselves automatically if someone has deleted them its a manual feature as your seeing , this would really annoy me if users were doing that in our Prime system , my idea would be to remove people that have access to prime apart from network administrators as there deleting devices you have added in and causing extra work , they shouldn't be deleting anything in PI without checking first , is the device active etc , narrow it down to a couple of admins that have access to make changes and the rest give them no admin access just to view
I don't think prime has the answer here as its doing what it should its the user at fault , removing them is the issue but from your point of view if it was happening to me and i couldn't prevent it you could get the original import list from LMS put it into excel sheet and then run a report of inventory in prime pull the current list add that into same excel sheet and search and replace using ctrl f function and then only add the devices that have been removed back in by bulk and rediscover them , this will stop duplicates
im not aware of a automated discovery section in Prime its something I have always had to enable per device or set of devices
