This problem is one we inherited rather than created. What happened is over the years, we have upgraded many people from other systems to ours, unfortunately one of our major competitors used Windows Server 2003. As such now we have many Windows Servers 2003. What Microsoft is going to dump like windows XP now, they will be stopping support on Windows Server 2003 next year. They will stop the stop security updates which besides creating several technical issues also creates a legal issue if data is breached.
They will also stop technical updates. Already we can see Windows XP is no longer a viable solution for mobile devices like tablets, smartphones, and notebooks. So will it be for Windows Server 2003.
You now need to consider seriously moving your business off of Windows Server 2003.