My PDF documents are not searchable (Only 2007 & 2010)
The most common reason why PDF files do not show up in search results is because they cannot be indexed due to the fact that they contain graphical images of text instead of an actual text “readable” by SharePoint. You can verify if that is the case by using Select Tool (Adobe Reader) to select individual words or letters in the document. If instead of individual word selection you get a rectangular selection area, the document in question is not searchable.
If you verify that this is the case and still want to make these files searchable, you can perform Optical Character Recognition (OCR) on these files and then save them as textual PDFs. The procedure in extreme cases may require printing out current documents, scanning them with OCR enabled software and then saving them into correct PDF format. Some software products may perform conversion on the fly.
Another reason why it is not possible to search for the content of PDF files is that a proper PDF iFilter is not installed or configured correctly. Please check our?Tech Blog for a tutorial on how to configure PDF indexing in SharePoint.