ERROR_DS_FOREST_VERSION_TOO_LOW 0x80072175

Error code 8565 · HRESULT 0x80072175

WINDOWS

The version of the operating system installed on this server no longer supports the current AD DS Forest functional level or AD LDS Configuration Set functional level. You must raise the AD DS Forest functional level or AD LDS Configuration Set functional level before this server can become an AD DS Domain Controller or an AD LDS Instance in this Forest or Configuration Set.

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_FOREST_VERSION_TOO_LOW is a Windows error code (system error 8565, returned as HRESULT 0x80072175) reported by Windows. Its official message is: “The version of the operating system installed on this server no longer supports the current AD DS Forest functional level or AD LDS Configuration Set functional level. You must raise the AD DS Forest functional level or AD LDS Configuration Set functional level before this server can become an AD DS Domain Controller or an AD LDS Instance in this Forest or Configuration Set.”

How to fix ERROR_DS_FOREST_VERSION_TOO_LOW

  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_FOREST_VERSION_TOO_HIGHERROR_DS_DOMAIN_VERSION_TOO_HIGHERROR_DS_DOMAIN_VERSION_TOO_LOWERROR_DS_INCOMPATIBLE_VERSIONERROR_DS_SAM_INIT_FAILURE_CONSOLEERROR_DS_LOW_DSA_VERSIONERROR_DS_INIT_FAILURE_CONSOLE

Source: Microsoft WinError.h

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