Below is the quote from the MapPoint 2004 EULA.
* Restrictions. You may not use the Software Product, including any Content, except as expressly permitted in this EULA. Without limiting the generality of the foregoing, use of the Software Product for any Fleet Application is limited to fleets of fifty (50) vehicles or less; and Real-time vehicle guidance applications are not allowed, irrespective of fleet size. For Fleet Applications, You must obtain a license for each vehicle, ie if You have five (5) vehicles, You must obtain five (5) licenses.