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You cannot downgrade to IE9 on server 2012. IE10 is an embedded OS component, it cannot be downgraded.<br />
Use compatibility settings as OriNetworks told or you can use an old Server with IE 9 (2008 R2). You can also use VDI, or publish IE9 using some other method, such as RemoteApp or XenApp etc.
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You cannot downgrade to IE9 on server 2012. IE10 is an embedded OS component, it cannot be downgraded.
Use compatibility settings as OriNetworks told or you can use an old Server with IE 9 (2008 R2). You can also use VDI, or publish IE9 using some other method, such as RemoteApp or XenApp etc.

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For a particular application I need IE 9 and my server has IE11 be default
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For a particular application I need IE 9 and my server has IE11 be default

How I can downgrade IE 11 to IE 9 in windows server 2012 as IE 11 is by default not came from windows updates.

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.