Terminal services installation depends upon your setup. In a regular on site server/workstation situation the workstations contain the CostGuard program and the data sits on the server. Then each workstation points to the data on the server.
But if you are using terminal services then both program and data can sit on the terminal server. And each user will remote in using their own login.
In this case you will only need to do a standalone install/activation.
If, however, each user will have CostGuard on their own PC and the data lives on the terminal server you would do a Server/Workstation install and activation.
Terminal services requires that you purchase and install the Advantage Remote Server upgrade in order to run terminal services successfully.