Connection Security Rule will not delete


  • I have a server that had a GPO apply to it, This GPO applied a incompatible security rule, now no other computer or server (domain joined or otherwise) can connect to it. Unfortunately the GPO has since been deleted  so the Security Rule is still in place and cannot be removed.

    How do i go about deleting this security rule when the GPO is no longer present?

    Also so you know, the server is the CA and as such cannot be just removed and rejoined to the domain, hope you can help.



    things iv tryed:

    Moved Server to new OU, removed membership of server to all groups, other than its primary group.


    HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Group Policy\History


    • Edited by David Hayman Tuesday, November 17, 2015 11:28 PM update
    Tuesday, November 17, 2015 11:04 PM


  • Hi David,

    According to your description, I would suggest you delete all group policy registry keys below.

    Before you delete registry key, you may need to backup for your AD.



    [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Group Policy Objects]


    For more information, here is a thread for your reference.

    Best Regards,


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    Friday, November 20, 2015 9:04 AM