DNS_ERROR_DP_ALREADY_ENLISTED 0x800726B0

Error code 9904 · HRESULT 0x800726B0

WINDOWS

This DNS server is already enlisted in the specified directory partition.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

DNS_ERROR_DP_ALREADY_ENLISTED is a Windows error code (system error 9904, returned as HRESULT 0x800726B0) reported by Windows. Its official message is: “This DNS server is already enlisted in the specified directory partition.”

How to fix DNS_ERROR_DP_ALREADY_ENLISTED

  1. Test connectivity to the remote host first (ping, then the exact port)
  2. Check firewall, VPN and proxy rules for the involved process
  3. Run 'ipconfig /flushdns' and 'netsh interface ip reset', then reboot

Related errors

DNS_ERROR_DP_ALREADY_EXISTSDNS_ERROR_DP_NOT_AVAILABLEDNS_ERROR_DP_NOT_ENLISTEDDNS_ERROR_DP_FSMO_ERRORDNS_ERROR_DP_DOES_NOT_EXISTDNS_ERROR_RRL_NOT_ENABLEDDNS_ERROR_RRL_INVALID_WINDOW_SIZE

Source: Microsoft WinError.h

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