Hope I'm not wrong but at the moment you need to manually assign a requester to an asset. It would be useful if the discovery agent to link the asset logged in/existing user to a requester using the active directory info, either matching email address or user account.
I would also like this.
I'm fairly sure the probe already sees who last logged in, and if it matches with a user they assign it? It's happened to a few of ours at least.