Hi I have created a new domain with 2 domain controllers 2008R2 Then created a 2008R2 server(running on VMware), where i installed Exchange 2013, and after that installed CU1, also applied all windows updates available. My problem is in Event Viewer System, I get this error several times each hour. The Windows Process Activation Service failed to generate an application pool config file for application pool 'MSExchangeRpcProxyAppPool'. The error type is '7'. To resolve this issue, please ensure that the applicationhost.config file is correct and recommit the last configuration changes made. The data field contains the error number. The application pool, changes between these: MSExchangeRpcProxyAppPool MSExchangeOABAppPool MSExchangeECPAppPool MSExchangeServicesAppPool MSExchangeOWACalendarAppPool MSExchangeOWAAppPool MSExchangeAutodiscoverAppPool MSExchangeRpcProxyAppPool I also get this once a hour. The Microsoft Exchange Transport service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 5000 milliseconds: Restart the service. Then this: The Service Control Manager tried to take a corrective action (Restart the service) after the unexpected termination of the Microsoft Exchange Transport service, but this action failed with the following error: An instance of the service is already running. Hope someone can help Regards Denis

Hi Please try the solution on this technet article http://technet.microsoft.com/en-us/library/cc734988(v=ws.10).aspx Test ApplicationHost.config by using Appcmd.exe Back up the ApplicationHost.config fileMake required changes to ApplicationHost.config For second error message http://social.technet.microsoft.com/Forums/en-US/exchangesvrdeploy/thread/26cc797d-6a40-4e18-bdb9-0e0387a12da1 In Server options, set the internal & external DNS lookup to internal and external DNS server addresses.On the receive connectors for the Exchange 2013 server, scope to only the address of the Exchange 2013 server.On the Send connectors for the internet, mark the option to use the external DNS lookup addresses.Reboot the server. For the last error message http://technet.microsoft.com/en-us/library/cc756373(v=ws.10).aspx Open the Services snap-in by clicking the Start button, Control Panel, and Administrative Tools, then double-clicking Services. Note: For Windows Vista, use the Classic View display option in Control Panel to see the Administration Tools. In the details pane of the Services snap-in, right-click on the name of the service you want to stop and select Properties.Click the Recovery tab and specify the recovery actions for the service (for example, restart the service or the computer, take no action, or run a program). Hope those will help CheersZi Feng TechNet Community Support

Hi<o:p></o:p> Thanks for the reply, I hope the last past will solve my problem.<o:p></o:p> But the first I have tried before, and i cannot finde any error in the ApplicationHost.config, its just list the hole file when I type "appcmd list config".<o:p></o:p> Any other solution?<o:p></o:p> Regards Denis

Hi See the description At the command prompt, type appcmd list config. The command should either return an error or successfully display the entire ApplicationHost.config file.If there are no errors, the XML and configuration in the file are valid; you may stop here. CheersZi Feng TechNet Community Support

Hi Its just display's the entire file, so no error, but i still get the errors in the event viewer. So it have noget solved anything.