#!/bin/bash

net ads search 'operatingSystem=macOS' |\
 perl -ane '$i=$F[1] if /^cn/; $h{$i}=$F[1] if /^lastLogonTi/; END{ printf "%s %d\n", $_, $h{$_} / 10000000 - 11644473600 for keys %h }' |\
 while read -a m; do printf "%-17s %s\n" ${m[0]} $( date +%F_%T -d@${m[1]} ); done 2>/dev/null