When installing Quest MessageStats Console where MAPI Collaboration Data Objects (CDO) version 6.5.8022.0 has been installed the installation fails at the Requirement Status stage with error: "MAPI Requirement FAILED: Please install Exchange System Manager (ESM) before installing Quest MessageStats 6.1.1. For non-Exchange environments you must install Microsoft Outlook"
This can happen when attempting to install Messagestats into a native Exchange 2007 enviroment.
The new version of MAPI Collaboration Data Objects version 6.5.8022.0 which Microsoft released to add support for Windows 2008 is not compatible with MessageStats 6.1.1
The issue will be resolved in a forthcoming release of MessageStats
Install MAPI Collaboration Data Objects (CDO) version 6.5.7940.0 to fix this issue as stated in the release notes:
If this fails uninstall the above MAPI CDO and install the below download: