Yes you will need at least one copy to put in the steps. Then FMS can send it as a server side script. The other users with client 9 will not be able to send it via a script. Only the server.
Shoot! That's what I was afraid of. So to confirm, I will need to place the email script (created with FM Pro 10) into the scripts directory on the server and then run it from the server only.
Appreciate the clarification!
Just confirming what "mr_vodka" stated (Thank you!) and your response.