Legal Court Disclosure required - but 'secure documents' will not merge with Combined Documents

I need to create a court disclosure document for a case - a Disclosure is meant to be every piece of communication and documents sent back and forth within a legal case. I have tried to combine all of my documents to make 1 PDF for the Disclosure. However, a few of the documents said they were Secure Documents and Password protected. They aren't password protected to view the documents in the sense that you cannot view them. You can open them, you just can't edit them. These documents will not merge into the overall Combined document to create 1 PDF disclosure which is very frustrating. Does Adobe Acrobat have a function that will allow me to add these secure documents into my Combined PDF disclosure? It's legally necessary and I cannot work around it. If Adobe doesn't have this, it would be really helpful if they would create functionality to allow a person to add any document to the disclosure whilst still maintaining their security.... I don't need to edit them. I just need to add them into the document in chronological order.