"How do we track and report on this new campaign so we can prove its value (ROI)? How do we know it worked and so we can do more of it!!!"
There are a lot of organizations that have the facilities for tracking built into applications through their enterprise. It seems though, that the normal case is that somewhere along the way the facilities for tracking marketing campaigns for reporting purposes is broken and does not work.
Here is a great solution that can track any online campaign.