Post Upgrade EFS Recovery Tool 1.0 (KB948690)

    This tool can be used by server administrators to recover special user profiles and EFS encryption keys after a Windows file server has been upgraded to Windows Server 2008.
    • Version:


      File Name:


      Date Published:


      File Size:

      280 KB

        When a user encrypts a file stored on a Windows file server the actual encryption of the file occurs on the server. To accomplish this, a special profile is created on the server in order to create and store an EFS (Encrypting File System) encryption key on behalf of the user. Thereafter, each time the user accesses their encrypted files on the server, this special profile is loaded on behalf of the user, and the previously created encryption key is used.

        Issue: These special user profiles are not migrated when a Windows file server is upgraded to Windows Server 2008. When a user attempts to access their encrypted files, the upgraded file server does not see a special profile for that user and subsequently invokes the creation of a new special profile, with new EFS encryption keys. These new keys are now different than the original keys for the user, and therefore the decryption of previously encrypted files fails.
    • Supported Operating System

      Windows Server 2008

        Windows Server 2008
      • 1. Click the Download button on this page to start the download.

        2. Do one of the following:

        - To start the installation immediately, click Run.

        - To save the download to your computer for installation at a later time, click Save.

        - To cancel the installation, click Cancel.

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