http://www.microsoft.com/download/en/details.aspx?id=28207

New Version release:

 Version: 14.2.247.5 Date Published: 5 Dec 2011

Enables system administrators to view and evaluate individual users' usage and experience with Microsoft Exchange Server.

Download: http://www.microsoft.com/download/en/details.aspx?id=11461

When upgrading your Exchange 2010 CAS to SP2 you may encounter the following error:

The "IIS WMI Compatibility" component is required.  Install the component via the Web Server Manager.

The IIS6 WMI Compatibility is a new prerequisites for upgrading to Exchange 2010 SP2

To upgrade from the command line without erros run:

setup.com /m:upgrade /InstallWindowsComponents

To upgrade from the GUI without erros

Before you run the Exchange SP2 setup program on your CAS Servers do the following:

• On the Start menu, navigate to All Programs > Accessories > Windows PowerShell. Open an elevated Windows PowerShell console, and run the following command:
  Import-Module ServerManager
• Use the Add-WindowsFeature cmdlet to install the necessary operating system component:
  Add-WindowsFeature Web-WMI