MaxiSun is an interface system between Infor SunSystems/SAP Business One/other ERP systems and other third party business applications. The original MaxiSun software was developed to integrate Maximo and SunSystems, in 2001, by Sapphire Systems. Early versions of the software were very “black box ” systems in that there was very little that could be modified by the client after the installation had taken place. History These mapping settings needed a dynamic storage facility so this was created using a Microsoft Access database initially, later upgraded to SQL Server.