Update package name: Citrix_Virtual_Apps_and_Desktops_2507_LTSR_CU1_Update2.zip 

File name: NetLicwrapper.dll, Citrix.Licensing.LasPolEng.dll 

For: Citrix Virtual Apps and Desktops 7 2507 Long Term Service Release (LTSR) Cumulative Update 1 (CU1). 

Replaces: None 

Date: Apr 2026 

Languages supported: English (US), German (DE), Spanish (ES), French (FR), Japanese (JA), Simplified Chinese (SC) 

Readme version: 1.00 

Readme Revision History 

Important Note(s) 

Caution! This release may require you to edit the registry. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. 

This Update is for Version 2507 LTSR CU1 of the Citrix Virtual Apps and Desktops. Any known issues in Version 2507 LTSR CU1, except for the specific issues resolved in this release, still apply. 

Where to Find Documentation 

This document describes the issue(s) resolved by this Update and includes installation instructions. For additional product information, including supported operating systems and system requirements, see Citrix Virtual Apps and Desktops 2507 LTSR CU1 on the Citrix Product Documentation site. 

Symptoms 

ICA Session launches may fail with reason "Licensing" in Citrix Director after the controller has entered an emergency license caching mode but is still within grace period. 

or 

When LAS connection is lost, end users fail to launch desktop or application sessions with error in event log with event id 1163 

New Fixes in This Release 

This release includes bug fixes for the License Activation Service (LAS) to improve high-availability (HA) performance and ensure accurate licensing status reporting, and to address the symptoms mentioned above. 

Key Improvements 

Race condition during licensing state transitions could lead to incorrect license caching mode period calculations. This prevents session launches (CVADHELP-31920). 

Fixes from Replaced Updates 

No Updates were replaced by this release. 

Installing and Uninstalling this Release 

Notes: 

Maintenance Window Recommendation: Citrix recommends scheduling a maintenance window to minimize user impact during the update process.  

Caution: Citrix recommends that you back up your database before installing this hotfix. Doing so allows you to manually restore your database to the backed-up version. Any changes made between backup and restore will be lost. For information about backing up and restoring your database, see: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/2507-ltsr/upgrade-migrate/upgrade 

To Install This Update: 

1. Use the following steps to apply this update: 
2. Stop the Citrix Broker Service and Citrix High Availability Service.  
3. Rename the files NetLicwrapper.dll, Citrix.Licensing.LasPolEng.dll under C:\Program Files\Citrix\Broker\Service to NetLicwrapper_Backup.dll, Citrix.Licensing.LasPolEng_Backup.dll. 
4. Extract the downloaded ZIP file and copy the extracted files to C:\Program Files\Citrix\Broker\Service. 
5. Restart the Citrix Broker Service and Citrix High Availability Service. 

To Uninstall This Update:

Use the following steps to remove this update: 

1. Stop the Citrix Broker Service and Citrix High Availability Service. 
2. Rename the files NetLicwrapper.dll, Citrix.Licensing.LasPolEng.dll under C:\Program Files\Citrix\Broker\Service to NetLicwrapper_Update1.dll, Citrix.Licensing.LasPolEng_Update1.dll. 
3. Rename the files NetLicwrapper_Backup.dll, Citrix.Licensing.LasPolEng_Backup.dll under C:\Program Files\Citrix\Broker\Service to NetLicwrapper.dll, Citrix.Licensing.LasPolEng.dll. 
4. Restart the Citrix Broker Service and Citrix High Availability Service. 

Files Updated (All Dates/Times UTC) 

File Checksum 

This is for 2507 LTSR CU1 HF for LAS