configuring outlook

I have a pc that was once part of an exchange server. When I open Outlook it tries to configure it. There is a mesasge box that comes up that says the exhange server is unavailable, retry, work offline or cancel. I select work offline, I get the error messsage “unable to open your default email folders. Your profile is not configured”. The only choice is OK which shuts down Outlook.

How do I get it to not look for the exchange server? What are the files that make up the default email folders and where are they located?

Thanks