In this post, you’ll learn more about the Error FVE_E_KEY_LENGTH_NOT_SUPPORTED_BY_EDRIVE – 0x803100A7 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_KEY_LENGTH_NOT_SUPPORTED_BY_EDRIVE – 0x803100A7
Win32 COM Error Error Description
The required authentication key length is not supported by the drive.