Must all product installations name the same license server?

Only different products that are installed from different installers can point to different license servers, as long as the different license servers are all on the same network and have the necessary licensing privileges.

Note: In some cases, such as for Autodesk Simulation Moldflow Insight, where two applications; Autodesk Simulation Moldflow Synergy - User Interface and Autodesk Simulation Moldflow Insight - Solvers are both required to run the product, the server named in the second installation will be the server used for both. It is vital, therefore, that you make sure that the servers have the necessary licenses for your application.