Windows AD accountexpires 欄位摘要

1700-01-01  最早時間表示
31241952000000000

1970-01-01
116445312000000000

2020-08-01
132407712000000000

10000000 = 1 秒 

PHP程式計算時間

$time1="2020-08-01 00:00:00";
$time2="2020-08-15 00:00:00";
132407712000000000 + (strtotime($time2) - strtotime($time1)) * 10000000