MapPoint can only calculate one route at a time so I don't think there is a way to do this in one go - unless you make the route go from point A to destination Z, then to point B and on to destination Z, etc. all as part of the same route. You can then extract the data you need from this complex route (i.e. only the A-Z, B-Z, C-Z parts).



If you go for this option, make sure you don't take a shortcut by assuming the distance for Z to B is the same as the distance from B to Z - with one-way streets and turning restrictions, these are likely to be different!