Microsoft released the August 2009 version of the standalone Exchange Server 2007 SP2 help file.
This download contains a standalone version of Microsoft Exchange Server 2007 SP2 Help.
The Exchange Server 2007 SP2 Help can help you in the day-to-day administration of Exchange. Use this information to guide you through Exchange Server 2007 SP2 features, tasks, and administration procedures.
The self extractor default install location is C:\Program Files\Microsoft\Exchange Server\Bin. To view the most recent version of the Help file within Exchange Server, be sure to extract the Help file (exchhelp.chm) to the folder where the Help file is currently installed. You can search your local drive to find the location where the Help file is installed (typically C:\Program Files\Microsoft\Exchange Server\Bin).