It's not the answer to your specific question as such, but it may be what you want !
I doubt it Ray. The link you give describes a network with Exchange as the mail server, and SME server just as an inbound mail gateway. Francois says he wants to use SME server as the mail server.
Exactly. I want to avoid Exchange.
The system currently has a Windows Server 2003 Domain Controller which I can't replace, and I need to add a mail server to this setup as quickly, reliably and cheaply as possible, for up to 300 users. Imagine how handy it would be if I could create all my users on AD and give them mail accounts on SME. SME is great by itself, but it needs to be more "integrateable". Another reason for using SME is that it will sit directly on the internet, so the security features of SME are attractive, and I simply don't want a Windows box on a public IP.