https://blog.gongquiz.com/2021/05/26/windows-server-2008-r2%ec%9d%98-active-directory-%ec%84%9c%eb%b9%84%ec%8a%a4-%ec%a4%91%ec%97%90%ec%84%9c-%eb%84%a4%ed%8a%b8%ec%9b%8c%ed%81%ac%ea%b4%80%eb%a6%ac%ec%82%ac-2%ea%b8%89-2019%eb%85%84/