PDF iFilter Interface Adobe does not bundle the iFilter interface in the latest version of Adobe Acrobat Reader 11.x or DC 64bit. You need to manually activate the Adobe iFilter Add-On in order to be able to index and search PDF documents. Click here to download and install the Adobe iFilter interface: Activate Adobe iFilter Add-On … Continue reading PDF – Indexing on 64bit platforms (Win 7 / Desktop Apps)