Is your organisation still running Windows Server 2003? With end of support approaching (326 days, 9 hours and 44 minutes to be exact), you may be starting to look at your options.
Microsoft Virtual Academy has also recently launched a new course covering the migration off Windows Server 2003 with AppZero. They discuss upgrading to Windows Server 2012 R2 and the migration to Microsoft Azure. It is a relatively short course, but a great start in planning your migration off Windows Server 2003.