Citrix Director - unable to shadow session (remote assist) after OS patching in January
Article ID: CTX695983
Updated On:
Description
Citrix Director provides the invite file, and it can be downloaded without any issues.
Launch attempt fails with the error:
The events observed in the Event logs (Source: RemoteAssistance):
- Remote Assistance started with: -openfile "C:\Users\AdminUser\Downloads\Invite.msrcincident" as the command line parameters.
- The error message: The file could be corrupted, and it should be verified before trying again. If the problem persists, contact your system administrator. has been shown to the user.
- Remote Assistance has ended.
Environment
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Cause
Citrix Director Shadow Feature Fails with File Corruption Errors After OS Security Update
Resolution
We have made updates to our products in response to recent changes introduced by OS security updates.
LTSR
The enhancements are available in the updates for the following releases:
- 2203 CU7 : Citrix Virtual Apps and Desktops 2203 LTSR CU7 Update 3
- 2507 CU1 : Citrix Virtual Apps and Desktops 2507 LTSR CU1 Update 4
2402 The enhancements are targeted for upcoming Cumulative Update
CR
The enhancements are targeted for the upcoming Current Release version.
Citrix DaaS
- Targeted for an upcoming Citrix DaaS release
Please note that all items listed above represent targeted releases. Plans are subject to change, and inclusion is not guaranteed.
Workaround:
Customers who use the latest version of CVAD and Director can use a new functionality: HDX Screen Sharing.
https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/whats-new
Administrators / Help Desk users should be able to offer assistance using "msra.exe /offerra".
HDX Screen sharing for Director
HDX Screen sharing is available for shadowing using Citrix Director for Citrix Virtual Apps and Desktops on-premises installations and Citrix Monitor for Citrix Cloud deployments. HDX Screen sharing is the new method for shadowing and provides a native, low latency alternative to the current shadowing. HDX Screen sharing for Director is available for all VDAs, including non-domain joined and Entra ID joined VDAs.
Issue/Introduction
Citrix shadowing functionality is affected after recent OS patching.
Invite file cannot be launched from the Windows machine with security update installed.
- Windows 11 Update KB5074109
- Windows Server 2025 Update KB5073379
- Windows Server 2022 Update KB5073457
- Windows Server 2019 Update KB5073723
- Windows Server 2016 Update KB5073722
- Full list of Windows releases and patches: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-20824
Additional Information
This article will be updated during the investigation.
HDX Screen sharing:
https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/whats-new
https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/graphics/introduction/hdx-screen-sharing
