The Windchill Server GUID information is available in the Windchill server. Navigate to Site > Utilities > Windchill Performance Advisor. The GUID is displayed at the top of the Windchill Performance Advisor wizard.

Alternatively, you can access the Windchill Server GUID information that is stored in the WindchillSystemInformation.xml file. This file is available in a zip file under the folder <Windchill>/utilities/PerformanceAdvisor/reports/sent.

The following example shows a code snippet from that file.