Microsoft Download Center Archive

Active Directory Lightweight Directory Services (AD LDS) for Windows7

  • Published:
  • Version: 6.1.7600.16494
  • Category: Application
  • Language: English

Active Directory Lightweight Directory Services (AD LDS) provides directory services for directory-enabled application. This download pertains to AD LDS for Windows® 7 operating system.

  • AD LDS is a Lightweight Directory Access Protocol (LDAP) directory service that provides flexible support for directory-enabled applications, without the dependencies that are required for Active Directory Domain Services (AD DS). AD LDS provides much of the same functionality as AD DS, but it does not require the deployment of domains or domain controllers. In environments where AD DS exists, AD LDS can use AD DS for the authentication of Windows security principals. You can run multiple instances of AD LDS concurrently on a single computer, and have an independently managed schema for each AD LDS instance.


Status: Deleted

This download is no longer available on The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to August 2020.

FileSHA1 HashSize
Windows6.1-KB975541-x64.msuffe3ff2840986f363ef95defd946a24e6368154c15.45 MB
Windows6.1-KB975541-x86.msuebaf70778e82a59f463db35daf69beb22404e89314.55 MB

System Requirements

Operating Systems: Windows 7 Enterprise, Windows 7 Professional, Windows 7 Ultimate

    Installation Instructions

    • Installing AD LDS
      1. Download AD LDS for Windows 7.
      2. Run the downloaded AD LDS file to install the AD LDS binaries.
      3. Refer to the following instructions for installing AD LDSinstances:
        1. Create a new AD LDS instance:
        2. Create a replica AD LDS instance:
        3. Perform an unattended install of an AD LDS instance:

      Uninstalling the AD LDS binaries
      1. Uninstall all AD LDS instances as explained in the section, “Uninstalling an AD LDS instance”.
      2. Go to Control Panel, select Programs, click on Programs and Features, and click on View installed updates.
      3. Select Active Directory Lightweight Directory Service for Windows 7.
      4. Click Uninstall.

      Upgrading Windows Vista with AD LDS to Windows 7
      1. You need to back up content of all the AD LDS instances on the machine that you want to upgrade. This can be done with dsbutil or the personal backup system of the ISV application.
      2. Using dsbutil follow the instructions under Backup up AD LDS instance data with Dsdbutil.exe at
      3. Uninstall all the AD LDS instances as explained in the section "Uninstalling an AD LDS instance".
      4. Uninstall the AD LDS binaries as explained in the section "Uninstalling the AD LDS binaries".
      5. Upgrade the operating system from Windows Vista to Windows 7 using the standard upgrade procedure. The upgrade from Windows Vista to Windows 7 will be blocked by the compatibility check if AD LDS is installed. You will not be able to proceed with the Windows upgrade.
      6. After completing the operating system upgrade, download and install AD LDS for Windows 7.
      7. To restore the AD LDS instance’s data, follow the instructions listed at:

      You can post your questions and feedback to the Microsoft Active Directory newsgroup at