I am receiving the following error while running the /PrepareAD command: D:\>setup /PrepareAD /ONJT Welcome to Microsoft Exchange Server 2007 Unattended Setup Preparing Exchange Setup No server roles will be installed Performing Microsoft Exchange Server Prerequisite Check Organization Checks ......................... COMPLETED Configuring Microsoft Exchange Server Organization Preparation ......................... FAILED An error occurred. error code was 3221684247 message was Data error (cyclicredundancy check).." The Exchange Server setup operation did not complete. Visit http://support.microsoft.com and enter the Error ID to find more information. Exchange Server setup encountered an error. D:\> I visited the referenced website and entered the error id in a search, but found no help entries. Anybody know what I should do now? Thanks,

Hi, Please go Event Viewer to check whether there are some application log which indicates relevant hard disk error. Generally, CRC (cyclic redundancy check) error indicates some damages in the hard disk or setup CD media. Some non-physical hard disk error can be fixed by using chkdsk tool. For more information about it, please refer to below link: http://support.microsoft.com/kb/315265 Note: The above link is aWindows XP KB article, but it also should be suitiable for Windows 2003 server. Regards, Jason