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If you use DNS name (auto) and the hostname gets changed, the network authentication will usually continue to function using the certificate with the old hostname. This can later lead to client certificate renewal failure, with the notification: "Renewal of client certificate failed - subject has changed OLDNAME > NEWNAME". You can change the behavior through the network.scepclient.cert%.hostname_change_handling registry key. For details and troubleshooting, see (12.4-de_orig) Troubleshooting: SCEP Certificate Renewal Failure due to Hostname Change.