After restart the server i got the following error trying getting access to owa: Server Error in '/owa' Application. Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user. To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access. Please Help

Its looking OWA virtual directory is crached now due to any patch update but i can see you did't do any change. Please have a look of below thread. http://social.technet.microsoft.com/forums/en-US/exchangesvrclients/thread/dab00947-b77f-45e7-b97d-4ad551010bb2/ Anil

Thanks a lot, let see if help me, i'll let you know.

Hi, Please try to access the public web, such as http://exchange.domian.com/public and see if the issue persists. If the error does not happen, the problem should reside in the OWA virtual directory. Please follow these steps to check the permission settings for OWA: 1. Open IIS, right click OWA and choose Permission. 2. Make sure that Authenticated Users have read permission of this folder.

The problem persist, when i try http://exchange.domian.com/public ask me for the username and password, when i put my credentials y have the following error: The service is unavailable. HTTP/1.1 503 Service Unavailable i remove and recreate the owa directory with the commands Remove-OwaVirtualDirectory and new-VirtualDIrectory and the problem is the same.

After reinstall IIS, uninstall client access role, when i try to install the client access role i have the following error: Client Access Role Failed Error: Process execution failed with exit code -1. Elapsed Time: 00:00:21 Please Help

Please check error cause in location c:\exchangesetup. Did you get any alerts when removed CAS role from server. remove pre-requiste in sevrer and again install it including IIS and .NET Framework 2.0 is installed then launch the setup.Anil