we got some Adobe Reader installations on clients without acitve connection to the internet.
So an active update to receive the trusted certificates is not possible.
In past years an past installation it was possible to store the file addressbook.acrodata in the location %ALLUSERSPROFILE%\Adobe\Acrobat\DC\Security.
Now we have the same problem again, users got the message the signee is unknow or untrusted.
Storing the new addressbook.acrodata file at the location %ALLUSERSPROFILE%\Adobe\Acrobat\DC\Security doesnt work with this operation system (i checked it on the old old servers and it works now as before - but not on our current active servers)
maybe somebody with any ideas?
Hope you are doing well. Sorry for your experience with Acrobat Reader.
You might want to check the given link for more information: Trust Methods — Acrobat Desktop Application Security Guide
Let us know if this helps.