ERROR_DS_AUTH_UNKNOWN 0x8007202A

Error code 8234 · HRESULT 0x8007202A

WINDOWS

The authentication mechanism is unknown.

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_AUTH_UNKNOWN is a Windows error code (system error 8234, returned as HRESULT 0x8007202A) reported by Windows. Its official message is: “The authentication mechanism is unknown.”

How to fix ERROR_DS_AUTH_UNKNOWN

  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_AUTH_METHOD_NOT_SUPPORTEDERROR_DS_INAPPROPRIATE_AUTHERROR_DS_REFERRALERROR_DS_STRONG_AUTH_REQUIREDERROR_DS_UNAVAILABLE_CRIT_EXTENSIONERROR_DS_CONFIDENTIALITY_REQUIREDERROR_DS_COMPARE_TRUE

Source: Microsoft WinError.h

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