You are getting ready to set up a Web Server that is also serving as a ProjectWise Gateway Server for your users. How many servers do you need?
One server is rated at 150 connections which applies to the Web Server software itself, but separately the Gateway Server can handle 300-400 connections.
Are you saying that a Gateway Server could concurrently handle 150 Web clients and 150-200 “thick” clients? In other words, the Gateway Server can handle 400 connections split between thick and thin clients, with a maximum of 150 of those being Web (thin) clients?