Removing members from AWS Security Incident Response
To remove an account from your membership, you can remove a member account from your organization, move accounts out of your selected OUs, or remove OUs from your membership.
To remove an account from your membership, follow the procedures for removing a member account from an organization.
To move accounts out of your OUs, follow the procedures for Moving accounts to an organizational unit (OU) or between the root and OUs with AWS Organizations.
To remove OU from your membership, follow the procedures for Managing membership with organizational units (OUs).