PowerPoint's hyperlinks not working in PDF after conversion.
The first possibility could be "Add link to PDF" check box under the Gaaiho PDF Add-in is not selected. The second reason could be, using the virtual printer to convert files instead of using the Gaaiho add-in or Save as Gaaiho PDF.
To check the settings, go to the top tab of "Gaaiho PDF" add-in in PowerPoint and click "Settings". See if "Add link to PDF" is checked. If so, use the add-in function to convert the PowerPoint file or "Save as Gaaiho PDF" under "File", and the hyperlinks will remain active in the PDF.
Can't find the add-in after installation?