ERROR_DS_MISSING_FOREST_TRUST 0x800721C9

Error code 8649 · HRESULT 0x800721C9

WINDOWS

The operation failed because the addition/modification referenced an inbound forest-wide trust that is not present.

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_MISSING_FOREST_TRUST is a Windows error code (system error 8649, returned as HRESULT 0x800721C9) reported by Windows. Its official message is: “The operation failed because the addition/modification referenced an inbound forest-wide trust that is not present.”

How to fix ERROR_DS_MISSING_FOREST_TRUST

  1. Run the affected program as administrator (right-click → Run as administrator)
  2. Check permissions on the target resource: Properties → Security → your account
  3. Check Event Viewer → Windows Logs → Security for the matching audit entry

Related errors

ERROR_DS_MISSING_INFRASTRUCTURE_CONTAINERERROR_DS_MISSING_FSMO_SETTINGSERROR_DS_MISSING_EXPECTED_ATTERROR_DS_MISSING_SUPREFERROR_DS_UPN_VALUE_NOT_UNIQUE_IN_FORESTERROR_DS_VALUE_KEY_NOT_UNIQUEERROR_DS_SPN_VALUE_NOT_UNIQUE_IN_FOREST

Source: Microsoft WinError.h

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