How do you set an expiry date on a PDF in Adobe Acrobat DC?

It's possible to use a script to close a PDF file after a specific date, but there are many ways around it (for example, turning off JavaScript or changing the system date...).

If you want a really secure solution then you can do it using DRM technology, but that is very expensive.

What makes you believe that it can do that? Is there anything in the help or marketing which seems to say that, which we can help you follow up...?