Is deploying a Exchange 2007 Server (Standard Edition) with all roles on one machine a supported configuration? It seems that this is the default option in a SBS / EBS scenario but I'm already invested in Windows Server 2003 Standard domain. I'm in a SMB environment with around 40 users. I'm currently using a hosted provider, but the monthly fee has grown so much that I could lease a really nice machine for less money. The Outlook connections' bandwidth is no joke either.
I'm thinking I would have to setup this all-in-one server on the LAN and make some very specific rules on my firewall. All the Microsoft documentation I can find seems to imply multiple servers. Does anyone here have advice on setting up an all-in-one Exchange box and whether this is supported?