Figure out which version of Sage 50 you can use. Sign up here to get into the Sage Customer Portal and download what you need.
You can download the installation files from the Sage 50 Download Portal.
Start by setting up the Sage 50 Connection Manager on the server. Here's how to do it.
After Server Installation. Once you set up the server, you can start installing on other computers in your network.
Check the Version. When you start Sage 50 Accounting, make sure all computers are using the same version.