When installing MessageStats to a drive other then the default c: you may encounter the following error:
"Error in custom action. The library c:\Program Files (x86)\Quest\MessageStats\QMSMigration.dll is invalid or could not be found"
The installer is still expecting to find the file in the default installation path and cannot.
This error can be ignored. Proceed with the installation. Once MessageStats is installed:
1. Open the MessageStats console
2. Connect to your Exchange Organization
3. Create and run a Default Gathering
Note: For instructions on how to connect to an Exchange Organization and how to create a Default Gathering, please reference the following Solution: https://support.quest.com/Search/SolutionDetail.aspx?id=SOL72857&category=Solutions&SKB=1