Can be used on up to 25 PCs—each PC requires a qualifying Windows professional license or higher.

The 30-day trial only includes the cloud service. If you are interested in evaluating Windows 7 Enterprise, please look into the 90-day trial.

Get it at http://www.microsoft.com/en-us/windows/windowsintune/try-and-buy.aspx

Read my favorites blogs:

Designing a backup less Exchange 2010 Architecture

Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008

Microsoft Exchange 2010 CAS Array – Steps and Recommendations

Appear Offline in Microsoft Office Communicator Server 2007

Microsoft Exchange 2010 Test cases

Microsoft Exchange Server 2010 Disaster Recovery