I'm a little confused as to your post. Outlook is a client, not a
server....Domino is a server, and natively has the Notes client as a
front-end.
Are you keeping the Domino server, and just want to use Outlook as the
front-end/client to access it? If so, that can be done; you need the Notes
Connector add-in (available from the MS download site).
Are you migrating *from* Notes/Domino entirely? If so, to what - MS Exchange
server?
Regardless, if you have a mail/groupware server, you really really really
ought to keep all your data stored therein, and not in the client (local
file/s on computer). Centralization is very important on networks...for
admin/backup/support purposes.
Please write back with more detail about what you're trying to do.