A. Windows 2000 supplies a directory services client which can be installed as described in 'Q. How do I install the Windows 9x directory services client?'.

To verify you have the required version, right click on c:\windows\System\Secur32.dll in Explorer and choose Properties. 
The Version tab should read Microsoft Win32 Security Services (Export Version) or Microsoft Win32 Security Services (US and Canada Only).

To enable NTLM 2.0 after installing the directory services client on Windows 9x machines perform the following on the domain controllers:

  1. Start the registry editor (regedit.exe)
  2. Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  3. Double click LMCompatibilityLevel (if it does not exist create of type REG_DWORD)
  4. Set to 3
  5. Click OK
  6. Reboot