Hi Ben,
JEC supports exchange2007, but this technique can't be used on exchange2007.
In most cases knowing your account and user information is very easy, they are the same as your OWA username.
When using English Exchange server, the folder names are the standard ones and will work automatically (JEC will use its default folder values).
When using a non English 2007 exchange server, the folder names need to be URL encoded, you can use Google to do this quickly, simply search the value you need to convert, and get the URL encoded value in the search URL (look at the attached image).