Nobody wants to spend money on upgrading a server or moving to another solution when the one they use works so well. But with the End Of Support for SBS 2003 looming, it is, sadly, not really a choice. I believe that this conversation on Microsoft’s TechNet sums up perfectly what many SMB’s are asking right now about moving off of SBS 2003:
The experts agree to move off of SBS 2003
There are numerous replies to this question on the forum, but they all pretty much say the same thing… It is time to plan to make the switch. Here is one that sums up the response nicely:
Also something else to keep in mind, old hacker and malware code is starting to make a comeback, some code that is older than 10 years, much like what your SBS 2003 was built off of, prime example is heartbleed. So another thing to keep in mind, after the July 2015 date and MS does find a vulnerability, you will not got patched/updated.
If you have a good UTM (Unified Threat Management) device and a good updated AV solution, and current workstation OS’, then I say you can buy yourself some extra time, but budget to replace it.