Why we need FilesDNA root Certificate?
By default FilesDNA is encrypting each PDF file with each user private Key, on top of that adding a user certificate to each PDF file.
When any user open the PDF file in Acrobat Reader, then if the Root certificate is not available, then Acrobat Reader can not authenticate the PDF and user Signature.
Example is a PDF file that is signed by FilesDNA user.
Install FilesDNA Root Certificate on Acrobat Reader
Lets see how to install FilesDNA Root Certificate after you download it from the above step.