Known issues

The Citrix Virtual Apps and Desktops 7 1811 release contains the following issues. (Components and features that are documented separately have their own known issues articles.)

This warning applies to any workaround that suggests changing a registry entry:


Editing the registry incorrectly can cause serious problems that might 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. Be sure to back up the registry before you edit it.

Install and upgrade

  • When installing a Controller and you select I want to connect to Smart Tools and Call Home on the Smart Tools page of the installation wizard, Call Home might not be enabled. As a workaround, either use the schedule feature in Citrix Scout or enable Call Home using PowerShell. [CAM-9907]

  • Error message after partial upgrade from 1808.2: After upgrading a Controller that also has Studio installed (but other Controllers aren’t yet upgraded), Studio might display “An unexpected error occurred” when an administrator requests machine catalog or Delivery Group details. After all of the Controllers are upgraded, the message does not appear. [BRK-2652]

  • If a time-out exception occurs during a StoreFront upgrade from the Citrix Virtual Apps and Desktops installer, then before restarting the upgrade:


  • When you start an application from StoreFront, the application might not start in the foreground or the application is in the foreground but might not have focus. As a workaround, click the icon in the task bar to bring the application to the front or in the application screen to bring it to focus. [HDX-10126]

  • After installing the Skype for Business Web App Plug-in, webcams might not be enumerated and meeting pages on Firefox might not refresh automatically. [HDX-13288]

  • You install an audio device on your client, enable audio redirection, and start an RDS session. The audio files might fail to play and an error message appears. As a workaround, add this registry key on the RDS machine, and then restart the machine:


    Name: EnableSvchostMitigationPolicy

    Type: REG_DWORD

    Data: 0 [HDX-15791]

  • When you connect to a new session, disconnect, and then reconnect to the same session, your desktop icons might flicker. As a workaround reset the user profile, log off the session, and log on again. [HDX-15926, UPM-1362]

  • Extractions of compressed files might fail. This failure can occur while using the Microsoft extract utility on the VDA to extract a zip file on the client into the same directory on that client. Workarounds include:

    • Extracting to a different directory than the one in which the zip file is located.
    • Using a different extraction utility, such as WinZip. [HDX-17052]
  • Files located in C:\Program Files\Citrix\PowerShell SDK are missing after upgrading. This issue occurs because the CDF version used by Citrix Provisioning does not match the version used by other components associated with Citrix Virtual Apps and Desktops. As a result, newer CDF files have a lower version number than previous ones. This issue does not affect the functionality of importing CPV device collections into machine catalogs. To resolve this issue:

  1. Close Citrix Studio.
  2. Mount the new Citrix Virtual Apps and Desktops ISO.
  3. In the mounted ISO, navigate to \x64\DesktopStudio.
  4. Right click on Citrix Provisioning PowerShell SDK x64 to display a contextual menu.
  5. Select Repair.
  6. Run the Repair option. The installation adds the two CDF files. [PVS-4009]


  • The RDS license health status in Director might incorrectly display a “License Available” message when your License Server is configured correctly but the machine is under grace period. [BRK-2499]


  • Citrix Studio fails to update or display the following warning message on the Details tab in the lower pane: “This machine catalog has the following warnings: The Microsoft Remote Desktop licensing check returned the following issue: a licensing type is not configured.” Be aware of the following two scenarios:

    • When your License Server is configured incorrectly during machine catalog creation, you see the warning message. However, after you correct the License Server configuration and refresh Citrix Studio, the warning message is still displayed.
    • When your License Server is configured correctly during machine catalog creation, you do not see the warning message. However, if changes are made to the Server OS VDA resulting in license setting errors, Citrix Studio does not display the warning message.

    This issue occurs because Citrix Studio checks the RDS license status only during machine catalog creation. [STUD-4318]


  • When using Windows 10 1607, disconnecting from the session might not work correctly. [HDX-13448]

  • When using Windows 10 1809 LTSC, VCLibs dependencies fail to install. [HDX-16754]

  • Performance counters might not display in the “Available counters” list during a session. [HDX-17017]

  • When using Windows 10 1809 Enterprise VDA, the disconnect button might not work correctly. [HDX-17150]

  • The XenCenter console might display a blank screen after disconnecting a XenDesktop session. As a workaround, send CTLR+ALT+DEL to the XenCenter console to make the console screen appear. [HDX-17261]

  • DPI might not match during a session running on Server OS 2016 or 2019 when the DPI is changed on the client and the session is reconnected. As a workaround, resize the session window to match the DPI. [HDX-17313]


  • Universal Print Server printers selected on the virtual desktop do not appear in the Devices and Printers window in Windows Control Panel. However, when users are working in applications, they can print using those printers. This issue occurs only on the Windows Server 2012, Windows 10 and Windows 8 platforms. For more information, see Knowledge Center article CTX213540. [HDX-5043, 335153]

  • The default printer might not be marked correctly in the printing dialog window. This issue does not affect print jobs sent to the default printer.[HDX-12755]

Third-party issues

  • Because of a recent change in a Microsoft default setting, the hardware encrypted USB mass storage devices redirected using generic USB in RDS environments might fail for non-administrator accounts. Change this behavior by editing the local policy setting on the VDA. Use the local Group Policy editor to select Computer Configuration > Administrative Templates > System > Removable Storage Access and enable the policy All Removable Storage: Allow direct access in remote sessions. [HDX-16480]

  • When a server or workstation has just over 2000 disconnected sessions before being restarted, the server doesn’t allow you to reconnect. This issue also occurs if you use Remote Desktop Session Host (RDSH)/Remote Desktop Protocol (RDP) to connect. This issue is due to a Windows Server 2019 and Windows 10 version 1809 problem. As a workaround, restart the server or workstation. [HDX-16186]

  • A VDA running on Azure might freeze when using Enlightened Data Transport (EDT), requiring a session reconnect. As a workaround, set udtMSS=1400 and OutbufLength=1400 in Azure environments. For more information, see CTX231821. [HDX-12913]

  • In browser content redirection, after starting a YouTube video using the YouTube HTML5 video player, full-screen mode might not work. You click the icon in the lower-right corner of the video, and the video doesn’t resize leaving the black background in the full area of the page. As a workaround, click the full screen button, and then select theater mode. [HDX-11294]

Citrix Ready workspace hub

The following issues have been observed in the Citrix Ready workspace hub 1812 release:

  • The mouse cursor might move slowly across the Secondary Display Adapter. [WH-1664]

  • After upgrading the WebkitGTK version to 2.16 in the Raspbian Stretch OS, you can observe some performance delays. A request to downgrade the image to version 2.09 has been submitted to Stratodesk. [WH-1665]

  • In the upgraded Raspbian Stretch OS, the USB microphone fails when starting audio calls for the Optimization Pack. [WH-1647]

  • The initial launch screen might exit unexpectedly and the hub logon page appears. [WH-1371]

  • A DisplayConnector mouse thread might be terminated unexpectedly during session casting from a Xiaomi Mi pad. [WH-1419]


Known issues