Ok guy's so client chose to go the PDF route. What I have noticed is the URL works and opens up via Adobe Reader (as standard for PDFs), but Windows 10 *Sigh* opens it in other apps like MS Edge I believe? Which opens the PDF but the URL does not seem to work, as if it is not hyperlinked? Try again in Adobe Reader and everything works fine.
It weren't too long ago that the average computer user had Adobe Reader pre installed as standard, now with Windows 10 the worry is some people may not have the free Adobe Reader and use the preinstalled 'Apps' that can open PDFs to view the invitation and won't be able to click on the URL.
Is this just a case of Links only working in PDF's when opened with Adobe Reader or is there something I can do on my end for the link to work on any software / app that opens PDF files?