ERROR_DS_DRA_BAD_NC 0x800720F8

Error code 8440 · HRESULT 0x800720F8

WINDOWS

The naming context specified for this replication operation is invalid.

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

ERROR_DS_DRA_BAD_NC is a Windows error code (system error 8440, returned as HRESULT 0x800720F8) reported by Windows. Its official message is: “The naming context specified for this replication operation is invalid.”

How to fix ERROR_DS_DRA_BAD_NC

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_DS_DRA_BAD_DNERROR_DS_DRA_BAD_INSTANCE_TYPEERROR_DS_DRA_DN_EXISTSERROR_DS_DRA_BUSYERROR_DS_DRA_INTERNAL_ERRORERROR_DS_DRA_INVALID_PARAMETERERROR_DS_DRA_INCONSISTENT_DIT

Source: Microsoft WinError.h

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