Apple makes the iPhone Configuration Utility available from the Apple Support website, within the Enterprise section:
http://www.apple.com/support/iphone/enterprise/
The iPhone Configuration Utility is available for both Microsoft Windows and Mac OS X platforms, though for the purpose of creating Exchange Server specific Configuration Profiles, particularly those containing certificates, we will be using the Windows version.
The latest Windows version can be found under the link iPhone Configuration Utility for Windows. At the time of writing, the current version of the iPhone Configuration Utility is version 3.4, which has full support for the latest version of iOS, version 5. For full support for all iOS 5 features and improvements over previous versions, it's recommended to download and install this version or later.
The essential pre-requisite for the iPhone Configuration Utility is the installation of the Microsoft .Net Framework...