https://helpx.adobe.com/acrobat/kb/enable-embedded-index-to-search-pdf.html

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

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![](<https://s3-us-west-2.amazonaws.com/secure.notion-static.com/d1eb0701-dde6-43f0-ba10-a25688b8ab4e/bToggleUseEmbeddedIndex3.png>)

Create the bToggleUseEmbeddedIndex key in Feature Lockdown