I agree with
EMRhelp.org. It seems to me that this is another example of
trying to get OneNote to do more than what it was designed to do. You
would be much better off keeping your notes about the clients in OneNote
but keeping all those documents in a real document management program.
Some of those programs let you create shortcuts to the documents stored
in them. You could then paste those shortcuts into the appropriate page
in OneNote for quick access. Then they would be searchable. Remember,
when you insert a document as an icon on a OneNote page then those
documents aren't searchable.
Sometimes, when I have a lot of documents associated with a particular
OneNote Section, I will just copy those documents to the same folder that
the Section is stored in. Then I create a hyperlink to...