When I follow the process of mail merging, using an existing document
containing merge fields, "selecting from Outlook contacts", then clicking on
"Choose Contacts Folder" none of my address books contained in my public
folder list appear. Why?

Trying to mail merge in Word for envelope addressing.  
In Word, Tools, Letters&Mailing, Mail Merge.  Mail Merge window pane appears
on right. Select "envelopes" as document type and then Next.  Using Current
blank document.  Problem arrises next, when "Selecting Recipients".  I ...

I have set up a public folder in microsoft exchange as a shared list of
contacts for outlook.  For some reason, when I run mail merge from Microsoft
Word and pick "Select from Outlook contacts" it only displays my personal
outlook contacts folder & not the shared one on the ...