[Kazun]

Код:

 Group {"{0} {1}. {2}" -f $_.Name1,$_.Name2[0],$_.LastName} | Foreach {
		if($_.Count -eq 1) {
			$name = $_.Name        
			$sam = (Get-QADUser -DisplayName $name).SamAccountName
			if($sam) {
				$_.Group | Add-Member -MemberType NoteProperty -Name SamAccountName -Value $sam -PassThru
			}
			else {
				$_.Group | Add-Member -MemberType NoteProperty -Name SamAccountName -Value "" -PassThru
			}
		}
		else {
			$_.Group | Add-Member -MemberType NoteProperty -Name SamAccountName -Value "неуникальный" -PassThru
		}
    }