You can have a web server that's not on the internet - it's called an intranet. If people inside and outside your office are going to be using this document as an index/reference, they've all got to have the same access to the material it links to. Are the documents in a universally accessible format, like PDF or HTML ? If so, people can open them regardless of what OS or applications they're using. If they're in Word, and they have Vista or Win7, then Word Viewer will open them even if they aren't running MS Office. If they're in something like AutoDesk, they can only open them if they have a license.
If you have the documents in a Content Management System, there will be multiple ways to get in - via a 'thick client', via a web access on an Intranet, and web access to the Internet.
What kind of documents - PDF's, MS Office, or ??
Fred Wagner