Citrix has packaged Advanced Diagnostic Tools into the Citrix Supportability Pack. The latest edition can be auto updated and can be run from a USB drive. Here is an excerpt from the KB article:
“The Supportability Pack is a collection of popular tools (53 in total as of v1.2.4) written by Citrix engineers to help diagnose and troubleshoot XenDesktop/XenApp products. The tools are cataloged by features and components to make it easier to find and use, and the addition of Supportability Pack Updater since v1.2.0 makes the Pack self-updatable. Early versions of the Pack serves as a launch pad for efforts to raise awareness, improve accessibility, and promote use of internal troubleshooting tools. In subsequent updates of this pack the spotlight will shift to creation of new tools based on prevalent customer scenarios and your feedback.”
Note: The tools in this pack are not intended to replace system administration features that XenDesktop/XenApp provides for day-to-day system management. This collection of tools are specialized utilities for advanced troubleshooting in very specific areas.