I have an SBS 2011 server in an office running a domain and I want to add an additional server running SBS 2003 that would only be used to run and serve accounting software.
I have learned that two SBS servers cannot co-exist on the same network. Despite this, I would like to find a way to make this work.
I was advised to shut down all services on the SBS 2003 server, but I would like to get more opinions before implementing a solution.
Thanks.
You cannot have more than one SBS on a domain. If you need an additional server you should purchase a full Windows Server SKU.
Source
You can have the second SBS server on the same physical LAN, just not in the same domain. So build/rebuild the 2003 SBS as a new AD domain in your existing LAN.
Don't confuse "network" with "AD domain". It's a great idea if they're the same/overlapping, but in this situation, this is what will work best for you if you don't have the money to do this correctly.