Windows Longhorn

Windows Longhorn Server is the codename for the next server operating system from Microsoft. It will be the successor to Windows Server 2003, and will possibly be called Windows Server 2007 - it is known that Microsoft intends to keep the year based naming scheme of its server products, and the current release estimate for Longhorn Server is 2007.

Longhorn Server will be the server equivalent of Windows Vista (previously also known by the codename "Longhorn"), and is likely to contain many of the same features, as well as others aimed specifically at high-end users. It is expected that Windows Server 2007 will also ship with WinFS a Windows storage subsystem that was dropped from Windows Vista due to time constraints and will likely be part of Windows Vista Service Pack 1. This is a similar relationship to that between Windows XP and Windows Server 2003 (codenamed "Whistler" and "Whistler Server", respectively).

Microsoft announced the release of Beta 1 of Longhorn Server on July 27, 2005.