Is it possible to export PowerPoint to PDF with vector graphics preserved? Any method I try seems to rasterize all images, even though most, if not all, are .SVG placed in the PPTx presentation.
Sorry about the delay here. I am not exactly certain HOW it was solved (I suspect an update to Acrobat or PowerPoint or both) but nevertheless it more or less works now 🙂
With an Office 365 Subscription and the latest versions of PPT and Acrobat, and the "High Quality Print" setting checked on the Acrobat Add-in Preferences (accessible within PowerPoint) you too can Create a PDF and preserve the SVG graphics you have placed in your PowerPoint deck. The same works with Microsoft Word and Excel.
HOWEVER --- you need to ensure that your SVG does not use any gradients at all or the image will rasterize on export. Furthermore, your SVG absolutely CANNOT have any Clipping Masks within or it will rasterize on export to PDF. I really TRULY wish neither of these limitations still existed but as of 12/15/2017, they unfortunately do. Hint and wink to any Adobe or Microsoft development team members who may come across this post ;-)