Here are some ideas and resources to help you to assess, plan and execute on your migration strategy for Windows Server 2003 using Cloud services. Bryan Nairn and Niko Pamboukas on AWS blog list some options for those of you who are still running your applications on Windows Server 2003. Options do not only describe moving your 32-bit Apps to the Cloud, but include ideas on migrating to a Modern Operating System or modernizing your legacy Apps.
Read more here - https://aws.amazon.com/blogs/aws/moving-past-microsoft-windows-server-2003-end-of-life-using-aws/