I am looking for a feel on how much memory exchange 2010 will use. My server has 16 GB, we have about 90 mail boxes. The task manager is saying it is is using 95% which I am sure is to high. But I don't know if Exchange is taking it because it is there or if I need to add more memory. We also use this server as a file server for storing data, not expecting this to require that much resources other than disk space.