Installing the Exchange Server 2010 Client Access Server Pre-Requisites

On each server, from Windows PowerShell prompt, using runas administrator

PS C:\> Import-Module ServerManager

For only the Client Access Server pre-requisites:

PS C:\> Add-WindowsFeature NET-Framework,RSAT-ADDS,Web-Server,Web-Basic-Auth,Web-Windows-Auth,Web-Metabase,Web-Net-Ext,Web-Lgcy-Mgmt-Console,WAS-Process-Model,RSAT-Web-Server,Web-ISAPI-Ext,Web-Digest-Auth,Web-Dyn-Compression,NET-HTTP-Activation,RPC-Over-HTTP-Proxy -Restart

For the Client Access Server and Hub Transport Server pre-requisites:

Add-WindowsFeature NET-Framework,RSAT-ADDS,Web-Server,Web-Basic-Auth,Web-Windows-Auth,Web-Metabase,Web-Net-Ext,Web-Lgcy-Mgmt-Console,WAS-Process-Model,RSAT-Web-Server,Web-ISAPI-Ext,Web-Digest-Auth,Web-Dyn-Compression,NET-HTTP-Activation,RPC-Over-HTTP-Proxy -Restart

After the servers are restarted run the following command, again from an elevated PowerShell window.

Set-Service NetTcpPortSharing -StartupType Automatic