A solution I'm working on using Public Folders will be checking our business
system nightly and updating contact information in Exchange (2003). These
contacts will be synched with Outlook 2003 clients in Cached mode.

Is this synchronization done at a field level, or are the contacts
transferred in their entirety when anything about them is modified? If done
at field level, I will attempt to make my nightly updates work in a way which
will minimize the synchronization required to the clients, but if everything
is going to be sent regardless I can likely save some time by approaching it
in a more brute-force way.

Thanks,
Berkley