https://community.spiceworks.com/how_to/9942-complete-force-removal-of-a-domain-controller-from-active-directory-guide
1.先在一台正常的AD Server上執行ntdsutil 確認以下資訊
https://community.spiceworks.com/how_to/9942-complete-force-removal-of-a-domain-controller-from-active-directory-guide