For the most up to date information log on to the Quest and Security Support Site.
https://support.quest.com/unified-communications-diagnostics/
Select your version of Unified Communications Diagnostics.
The OS, hardware and software requirements for installation can be found in the Release Notes in the Technical Documentation section.
For large environments over 100 Exchange servers or for advanced deployments consult the Deployment Guide.
All Technical Documentation can also be found in the Documentation folder included with your Unified Communications Diagnostics download.