Save stale computer objects in AD as a variable:
import-module activedirectory
$date = (get-date).adddays(-120)
$comps = get-adcomputer -SearchBase “” -properties * -Filter ‘lastlogondate -lt $date
You can grab specific information, such as object name, by changing the last line to:
$comps = (get-adcomputer -SearchBase “” -properties * -Filter ‘lastlogondate -lt $date).Name