Exchange Server 2013 Installation Prequisites for 2012R2/2012/2008R2/2008 Servers.

Hi All,
I hope your reading/searching for help and it will beneficial for you ,I am posting this because so many times i answered this question so finally i decide to post it here So i went to Technet posting for all of you with updated prerequisites So you can get it easily .

Firstly you have to install RSAT tool for ADDS on 2008/2012 then i mention below prerequisites for 2008/2012.

Hope it useful for you .
Good LUCK..!!!! 

Active Directory Preparation and Prerequisites

The computer you want to use to prepare Active Directory for Exchange 2013 has specific prerequisites that must be met.
Install the following software, in the order shown, on the computer that will be used to prepare Active Directory:

1. .NET Framework 4.5.2
   
2. Windows Management Framework 4.0 (included with Windows Server 2012 R2)
   

After you've installed the software listed above, complete the following steps to install the Remote Tools Administration Pack. After you've installed the Remote Tools Administration Pack you'll be able to use the computer to prepare Active Directory. For more information about preparing Active Directory, see Prepare Active Directory and domains.

1. Open Windows PowerShell.
   
2. Install the Remote Tools Administration Pack.
   
   • On a Windows Server 2012 R2 or Windows Server 2012 computer, run the following command.
     
     Install-WindowsFeature RSAT-ADDS
     

   • On a Windows Server 2008 R2 SP1 computer, run the following command.
     
     Add-WindowsFeature RSAT-ADDS
     

Windows Server 2012 R2 and Windows Server 2012 prerequisites

The prerequisites that are needed to install Exchange 2013 on a Windows Server 2012 R2 or Windows Server 2012 computer depends on which Exchange roles you want to install. Read the section below that matches the roles you want to install.

Mailbox or Client Access server roles

Follow the instructions in this section to install the prerequisites on Windows Server 2012 R2 or Windows Server 2012 computers where you want to do one of the following:

• Install only the Mailbox server role on a computer.
  
• Install only the Client Access server role on a computer.
  
• Install both the Mailbox and Client Access server roles on the same computer.
  

Do the following to install the required Windows roles and features:

1. Open Windows PowerShell.
   
2. Run the following command to install the required Windows components.
   
   Install-WindowsFeature AS-HTTP-Activation, Desktop-Experience, NET-Framework-45-Features, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Clustering-CmdInterface, RSAT-Clustering-Mgmt, RSAT-Clustering-PowerShell, Web-Mgmt-Console, WAS-Process-Model, Web-Asp-Net45, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext45, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI, Windows-Identity-Foundation
   

After you've installed the operating system roles and features, install the following software in the order shown:

1. .NET Framework 4.5.2
   
2. Windows Management Framework 4.0 (included with Windows Server 2012 R2)
   
3. Microsoft Unified Communications Managed API 4.0, Core Runtime 64-bit
   

Windows Server 2008 R2 SP1 prerequisites

The prerequisites that are needed to install Exchange 2013 on a Windows Server 2008 R2 SP1 computer depends on which Exchange roles you want to install. Read the section below that matches the roles you want to install.

Mailbox or Client Access server roles

Follow the instructions in this section to install the prerequisites on Windows Server 2008 R2 SP1 computers where you want to do one of the following:

• Install only the Mailbox server role on a computer.
  
• Install only the Client Access server role on a computer.
  
• Install both the Mailbox and Client Access server roles on the same computer.
  

Do the following to install the required Windows roles and features:

1. Open Windows PowerShell.
   
2. Run the following command to load the Server Manager module.
   
   Import-Module ServerManager
   

3. Run the following command to install the required Windows components.
   
   Add-WindowsFeature Desktop-Experience, NET-Framework, NET-HTTP-Activation, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Web-Server, WAS-Process-Model, Web-Asp-Net, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI
   

After you've installed the operating system roles and features, install the following software in the order shown:

1. .NET Framework 4.5.2
   
2. Windows Management Framework 4.0
   
3. Microsoft Unified Communications Managed API 4.0, Core Runtime 64-bit
   
4. Microsoft Knowledge Base article KB974405 (Windows Identity Foundation)
   
5. Knowledge Base article KB2619234 (Enable the Association Cookie/GUID that is used by RPC over HTTP to also be used at the RPC layer in Windows 7 and in Windows Server 2008 R2)
   
6. Knowledge Base article KB2533623 (Insecure library loading could allow remote code execution)