ERROR_DS_NAME_TYPE_UNKNOWN 0x8007209F

Error code 8351 · HRESULT 0x8007209F

WINDOWS

The directory service cannot get the attribute type for a name.

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_NAME_TYPE_UNKNOWN is a Windows error code (system error 8351, returned as HRESULT 0x8007209F) reported by Windows. Its official message is: “The directory service cannot get the attribute type for a name.”

How to fix ERROR_DS_NAME_TYPE_UNKNOWN

  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_NAME_UNPARSEABLEERROR_DS_NAME_VALUE_TOO_LONGERROR_DS_NAME_TOO_LONGERROR_DS_NAME_TOO_MANY_PARTSERROR_DS_NOT_AN_OBJECTERROR_DS_SEC_DESC_TOO_SHORTERROR_DS_SEC_DESC_INVALID

Source: Microsoft WinError.h

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