Ivan T. Williams wrote:

We have Exchange 2003, and running the Outlook 2003 client. Our users
have archive PST files on a File Server we have.

Note that PSTs stored on a network share are unsupported and definitely not
recommended. There's a sugnificant chance of PST corruption. Are you users
willing to lose the data in those archives?

Now, if they keep the archive folders open on there PC (in the
Outlook file hierarchy, does Outlook continuously talk to the File
Server to keep the archive file/view updated, thus making our file
server slow due to network traffic from 200+ users?

If the archive files are actually open, there is a connection (and that
connection precludes making reliable backups of those PSTs) but I don't
think Outlook will spend its time updating anything on those PSTs, so I
think the taffic would be minimal.
--
Brian Tillman