Zend certified PHP/Magento developer

MS Powerpoint: Microsoft Office has identified a potential security concern error (and how it works with Trust Center)

We have a number of PPT files that have hyperlinks in them that connect to PDF files on our dropbox which are replicated thru dropbox onto our users’ hard drives. When the hyperlinks are run to show these PDFs, some users get this the ‘Microsoft Office has identified a potential security concern error’.

I thought if I just added that folder’s parent (and it’s subfolders) to MS-Office’s ‘Trust Center’, that would solve this problem so this message doesn’t pop up, but that doesn’t seem to be working. I found this option to turn off ALL warnings, but that seems a bit too strong. https://support.microsoft.com/en-gb/office/enable-or-disable-security-alerts-about-links-and-files-from-suspicious-websites-a1ac6ae9-5c4a-4eb3-b3f8-143336039bbe

Why is the Trust Center change not fixing this? Is there another way to fix this so it is comparably specific instead of the ‘turn every warning off’ option?

Dialog box with error message