What do you really want to import from Exchange? Just email addresses? Or domain information, phone details, contact addresses, etc. If all you need is only Email Address, then you might want export / import email addresses. That shud be fairly straight forward except the manual process involved.

Moreover, you can also eliminate the manual intervention by creating a windows service which does this for you at frequent intervals. But it really depends on what you want to integrate between you exchange environment and BV5.

Well, that can be done fairly simply. Please send me an email if you are interested and I can look into it based on your requirements. My email address is in my signature minus the spaces.