The Citrix LTSR Assistant scans components of XenApp and XenDesktop to determine whether they are LTSR compliant. The scanned components can reside on virtual or physical machines. A compliance report is generated showing the LTSR compliance status of the installed components. The report also includes recommendations for components that are not in compliance or are not running the latest version. The compliance results can be uploaded to Citrix Insight Services (CIS) for further analysis and acceptance.
Official Citrix link https://support.citrix.com/article/CTX209577