When accessing the WebReports Site for MessageStats or Spotlight On Messaging only a blank page is displayed with no error messages.
WorkAround 1:
From the "Server Manager" Console install the "Static Content" IIS role service.
WorkAround 2:
On Windows Server 2008 you may also issue the following command from an elevated command prompt:
Servermanagercmd.exe -i Web-Static-Content
On Windows Server 2008R2 issue the following cmdlets from a powershell window to install the "Static Content" IIS Role Service:
Import-Module Servermanager
Add-WindowsFeature Web-Static-Content