Trusted Document Fiasco

I work on a secure network that will never touch the internet at my office condicting critical safety work for folks around the world. As you can imagine we take security fairly seriously in this line of business. One of our precautions is to convert many powerpoint and other documents into PDF format with Adobe Acrobat Professional before sharing. Understand these are documents we create personally and trust implicitly. As we try to insert these documents into knowledge bases maintained in One Note and other resources, we receive an error message that the document is "not trusted" and the operation fails. We are baffled as to why a document that was created by our employees, never touched the net, and never left our positive control would be labelled by Adobe as "not trusted".

In most applications the user gets a security error message and when something is not trusted and an option to make the the document trusted. This does not seem to be the case with Adobe. How exactly then can I make my own Adobe documents, and those of my secure fellow employees, "trusted" so we can use them? I have seen no guide of any kind which addresses this in a secure environment.