When you install the DHCP Server Role on Windows 2012 R2, you may not be able to finish the post-installation wizard successfully. This DHCP Server Wizard Error message starts with “Failed to open registry key on target computer to set the status of post configuration task.”
And every tine you reboot the server you get the prompt:
- Error: The WinRM client received an HTTP status code of 504 from the remote WS-Management service
- Error: The computer name cannot be resolved
To get rid of the message, the registry key to fix this is under the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ServerManager\Roles\12. The value name is ConfigurationState and it must be changed from 1 to 2.
You must perform this operation when you are sure the operations the wizard would do are OK:
- If the server is member of a domain, the server is authorized in that domain. If you have re-used, re-installed the server, this may be the cause of your error
- The local group DHCP Users and DHCP Administrators exist on the server
If you’re unsure about the tasks that are OK, go to the last page of the wizard by committing the changes it proposes. You should get a image such as
If you modify settings a restart of the DHCP Serever service may be needed.