How to remove child domain

The following uses Active Directory Services wizard to remove the sub domain child.mydnstest from the parent domain mydnstest.

1. Run dcpromo /adv from command prompt
2. Select "This server is last domain controller in the domain" option in Remove Active Directory wizard and Click next.
3. Enter user name, password and the child domain name "child.mydnstest" to be removed in network credentials dialog and click next.
4. Enter Remove mode Admin user name and password and click next.
5. Check remove summary dialog box and click next
6. Thus successfully remove the child domain child.mydnstest