Binding a user to ADSI to get all attributes

 $objdomain = New-Object System.Directoryservices.DirectoryEntry
 $searcher = New-Object system.directoryservices.directorysearcher
 $searcher.SearchRoot = $objdomain
 $searcher.filter = "(&(objectcategory=user)(samaccountname=singhn))"
 $userobj = $searcher.findone()
 $u = $userobj.getdirectoryentry()
 $u | fl