1. Open Powershell with elevated rights using "Run As Administrator", and run below cmdlets to install prerequisites... Import-Module ServerManager 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 Set-Service NetTcpPortSharing -StartupType Automatic Cannot install Exchange 2010 on Win Server 2k8R2 2. Import-Module ServerManager 3. 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 4. Set-Service NetTcpPortSharing -StartupType Automatic 5. Client Access Role Failed Error: The following e...