Why do I receive error messages from various Microsoft Management Console (MMC) snap-ins?

A. If you're having problems with the Active Directory (AD) snap-ins (e.g., Users and Computers, Sites and Services) and have the Dr. Watson log, a missing registry value might be causing the problem.

  1. Start the registry editor (regedit.exe).
  2. Go to HKEY_CLASSES_ROOT\LDAP\Clsid.
  3. If the key doesn't exist, you need to create it. Paste the following statements into a file (fix.reg):

    \[HKEY_CLASSES_ROOT\LDAP\Clsid\]
    @="\{228D9A81-C302-11cf-9AA4-00AA004A5691\}"
    
    Save the file, then double-click it to create the value and resolve many AD-related MMC problems.
  4. Close regedit.exe.

If this approach doesn't resolve your problems, confirm that your version of activeds.tlb (in the %systemroot%\system32 folder) is at least version 5.0.2143.1 (right-click activeds.tlb and select Properties, then select the Version tab). If your version of activeds.tlb is earlier than 5.0.2143.1, replace it with the latest version from a service pack.

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