Most IT administrators should be aware that in the next six months Windows Server 2003 will reach its end-of-life. For the Windows 2003 Server family you should know the following dates: On July 13, 2010 Mainstream Support for Windows Server 2003 family ended. On July 14, 2015 Extended Support for Windows Server 2003 family will end. So one year after the Microsoft Windows XP (and Office 2003) retirement, now it’s the turn of the Windows Server 2003 operating system family.