The vendor has published 1 unique mention(s) for this bug: 1. When you upgrade a Single session VDA from any older version to 2507 LTSR CU1, the upgrade operation fails. As a workaround, see the Important note in Time zone control policy settings. This issue is resolved in Citrix Virtual Apps and Desktops 2507 CU1 Update 4 Latest urls for this bug: 1. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2507-ltsr/whats-new/known-issues