Windows Server 2012 remove or discard features

In Windows Server 2012, some features are no longer supported or are being removed. Most of these features involve only code or applications that run directly on the new operating system, and do not involve interoperability with other versions of the system. However, there are exceptions. For example, if you have an old application, you also expect the same result when it tries to interoperate with the new version of the server. Here are some of the main features that have been abandoned in Windows Server 2012 (a complete list on TechNet), which can affect cross-server compatibility or applications running on other servers: Cluster: Abandoning the 32-bit cluster Resource DLL support. Switch to the 64-bit version. And if some applications use the Cluster Automation Server (MSClus) COM application programming interface (API), it should be noted that it has been changed to an optional component called FailoverCluster-AutomationServer, which is not installed by default. Database: 16-bit and 32-bit ODBC and Oracle and Jet Red databases are no longer supported, they need to use the vendor's own database connector. ODBC/OLEDB support can be used for any version of SQL Server 2000 or higher. For these versions or later versions of SQL Server, SQL Native Client is required instead. For previous versions of SQL Server 7, support will not be available. This is undoubtedly a bad news for users who use SQL Server 6.5 or earlier. Any connection from Windows Server 2012 to a SQL Server 6.5 (or earlier) instance will report an error. Active Directory: Removed support for using Active Directory Lightweight Directory Services (AD LDS) as an authentication store, as well as support for "resource groups". UNIX: Many UNIX subsystem features have been abandoned. Microsoft removed the entire SUA POSIX subsystem and the Line Printer Daemon Protocol (LPDP) commonly used by UNIX clients. If you need to use Microsoft's UNIX features, consider using an open source tool such as Cygwin or MinGW. WMI: Many independent WMI providers have been removed or discarded: SNMP (SNMP itself has been abandoned); and Active Directory WMI provider (managed by Powershell) and Win32_ServerFeature API Finally, Windows helper (winhlp32.exe) also Has been deleted. Since Windows Server 2008, it has not been delivered to users with Windows Server. More importantly, Microsoft will not provide a download address for users to download Windows Help, which is available for older versions of Windows. (However, the Windows 8 client version of Windows Help will be available later.)