With December 2018 release of Acrobat DC and Acrobat Reader DC, the embedded index in the PDF is no longer used for searching.

Impacted versions

Product Version
Acrobat DC 19.010.20064
Acrobat 2017 17.011.30110
Acrobat 2015 Classic 15.006.30461


To enable the use of embedded index to search PDFs, you have to create a registry key (Windows), or create an entry in the FeatureLockdown.plist file (macOS) as mentioned below.
 

Create a registry key on Windows

  1. Quit Acrobat DC/Acrobat Reader DC application if it's already running.

  2. In Start > Search, type RegEdit and press Enter. The Registry Editor is displayed.

  3. Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\(product name)\(version)\FeatureLockDown.

    For example, the path for Acrobat DC is LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown.

  4. Create the following key:

    Key: bToggleUseEmbeddedIndex

    Data type: REG_DWORD

    Default Value: 1

    Note:

    The embedded index is not used while searching when the default value of the key is  0.

    To enable use of embedded index, set the value of the key to 1.

  5. Close Registry Editor.

Edit the FeatureLockDown.plist file on macOS

  1. Quit Acrobat DC/Acrobat Reader DC application if it's already running.

  2. Navigate to the folder /Library/Application Support/Adobe/(product name)/(version)/Preferences.

    For example, the path for Acrobat DC is /Library/Application Support/Adobe/Acrobat/DC/Preferences.

  3. Open the FeatureLockDown.plist file in any editor.

  4. Create the following entry in the FeatureLockDown file:

    Key: bToggleUseEmbeddedIndex

    Lock Path: FeatureLockdown

    Type: 0 (bool)

    Default  Value: 1

    Note:

    The embedded index is not used while searching when the default value of the key is  0.

    To enable use of embedded index, set the value of the key to 1.

  5. Save the FeatureLockDown.plist file.

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