Unable to access OWA in Exchange 2013

After installing Exchange Server 2013 preview, trying to access OWA or the new Exchange Admin Center will show a blank page or the page cannot be displayed message as shown below. If you try to open Exchange Management shell at this time, you will get an WinRM client error.

To fix this

Check all the Exchange Server related services are running on your Client Access Server. Everything is normal and still OWA and EAC are not accessible then register the .Net Framework 4.0 as shown below

1. Open Command Prompt with Run as Administrator Permission
   
2. Navigate to the path C:\Windows\Microsoft.NET\Framework64\v4.0.30319 and drag the file ASPNET_REGIIS to the command prompt and enter the switch "–IR –ENABLE". Command Prompt will look like this, check it and click enter.
   

   Microsoft Windows [Version 6.1.7601]
   

   Copyright (c) 2009 Microsoft Corporation. All rights reserved.
   

   C:\Users\administrator.CHENNAI>C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -ir –enable
   

   
   

   Once it is completed, IIS will start using Framework 4.0 which is a prerequisite for Exchange 2013 OWA and EAC to function
   

3. Restart IIS using "IISRESET" command. Internet Information Store service will stop and restart. Now you will be able to access OWA and EAC
   

Inform us if any issue in opening the OWA and EAC in Exchange 2013 preview.