Asset Management - Cleaning Up None scanned Assets

Hello there,
For all of us out there, which have a large pool of laptops, workstations and thin clients, its great to pull up reports, as long as they are up to date with Asset Info.

Yes, SD does go to AD and update new assets and puts them into the Asset DB, but how can I get rid of ones which have gone !!!

Is there a sync where if I delete in AD they disappear in SD ?
Or do I need to go One by One and remove them from SD ?

Can I suggest that in future, if any asset has not scanned successfully over a time period X (30 days, 60 days) or if it no longer exists in AD but is in SD (orphaned) that we can clean up the Assets in SD.

If this FUNC , already existis please let me know, otherwise it would be great in the next version