Sachin is 100% correct that you can't have two instances of AC running simultaneously on the same machine. Simply log out one user and log into the other.
I am really not understanding the scenario you are portraying.
Perhaps you could try to describe exactly what you are doing. From what you have provided, it sounds like you want more than one user logged into a computer using RDP simultaneously.
So how do I have more than one user using RDP on the same computer?
You can't have two users logged into a client computer using RDP simultaneously. When you log into a computer w/ RDP when another user is on it, they are kicked out.
In other words, HOW does AC work on a LAN but NOT a remote connection?
AC works on a LAN and a remote connection, but you can't have two instances of AC open on the same computer nor can you have two users logged into the same computer each using their own instance of AC. AC works by running one instance of AC on any number of computers. The "main computer" or "server" is not even running an instance of AC on it. It is simply the location of the database. While you can run an instance of AC on the "main computer" or "server," it is not necessary to make AC operate correctly.
Can you tell me why AC won't open in a separate user account on the same computer? I can't see why it wouldn't (famous last words I'm sure). Is there a way to "split" the server into 3 separate ones?.
I can't answer "why AC won't open in a separte user account on the same computer," I can only answer that it is programmed not to. As for "splitting the server into 3 separate ones," more information would be helpful about your network configuration so that we can know why you wish to do this. This desire to split the server makes it sound like you wish to have 3 separate practices sharing one server. What is your goal in splitting the server?
