Microsoft will end support for Windows Server 2003 on July 14, 2015. This change will affect your software updates and security options. 

Windows Server 2003 support is ending July 14, 2015

What does end of support mean for you? After July 14, Microsoft will no longer issue security updates for any version of Windows Server 2003. If you are still running Windows Server 2003 in your data center, you need to take steps now to plan and execute a migration strategy to protect your infrastructure. By migrating to Windows Server 2012 R2, Microsoft Azure or Office 365, you can achieve concrete benefits, including improved performance, reduced maintenance requirements, and increased agility and speed of response to the business.

Count Down Started to End Support

Visit below link to know the remaining days for Windows 2003 Support