How can I unlock an Active Directory (AD) user account by using Active Directory Service Interfaces (ADSI)? The code in Listing 2, page 6, which I obtained from Microsoft's ADSI software development kit (SDK), doesn't work.

The problem you're experiencing is a known problem with the Lightweight Directory Access Protocol (LDAP) provider on Windows 2000. The workaround is to use the WinNT: provider that Web Listing 1 (InstantDoc ID 26634) shows. You can find more information about the workaround in the Microsoft article "Programmatically Changing the Lockout Flag in Windows 2000" (;en-us;q250873). Microsoft fixed the problem in Windows XP.