In the same boat, here, Will.

All information provided *AS IS* with no implied guarantees.  No liability
accepted for turning your toaster oven into an ecosystem or viceversa.

Take a look in \Documents and Settings\...whoevertheuseris...\Local
Settings\Application Data\Microsoft\Business Contact Manager .

You may see:
MSBusinessContactManager.mdf and a similarly named
MSBusinessContactManager.ldf .

My *guess* is these hold your user's BCM data.

A good backup would be good before proceeding.

I've seen BCM installs disappear from Outlook before (in situations
unrelated to joining an Exchange server) and a reinstall of the BCM add-in
brought them back.  But having a good backup of your BCM data first should be
done.

I'm not aware of any specific support or reference for these files, but MS
may be able to provide a means of getting this data into the form BCM needs
to import it.

I'm of the assumption that Outlook connecting to the SBS server doesn't wipe
the BCM data, it just disconnects BCM from the Outlook profile.

The error you may have received at the beginning of this process (when
joining the Domain):
"Business Contact Manager
The Business Contact Manager database has been removed from this profile,
because this version of Business Contact Manager does not support Microsoft
Exchange Server e-mail accounts.  Please use a profile that does contain an
Exchange Server e-mail account.  If you don't have such a profile, you can
create a new one.  To ???? your profiles, click Start, click Control Panel,
double-clicki User Accounts (Category view only), and then do ???? Mail."
(The ???? were where my screen capture print out was garbled.)