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Horizon Client 5.2 for Windows | 17 September 2019

These release notes cover the following topics:

Key Features

VMware Horizon Client for Windows makes it easy to access your remote desktops and published applications with the best possible user experience on the Local Area Network (LAN) or across a Wide Area Network (WAN).

  • Support for Windows 10, Windows 8.1, and Windows 7
  • Unmatched performance - The adaptive capabilities of the PCoIP display protocol and the VMware Blast display protocol are optimized to deliver the best user experience, even over low-bandwidth and high-latency connections. Your remote desktops and published applications are fast and responsive, regardless of where you are.
  • Simple connectivity - Horizon Client for Windows is tightly integrated with VMware Horizon 6 and Horizon 7 for simple setup and connectivity.
  • Secure from any location - At your desk or away from the office, your data is delivered securely to you wherever you are. SSL/TLS encryption is always used to protect user credentials, and enhanced certificate checking is performed on the client device. Horizon Client supports optional RADIUS and RSA SecurID authentication. You can also install Horizon Client so that it runs in FIPS mode.

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What's New in This Release

  • Log in as current user feature supported in one-way trust domains
    You can use the Log in as current user feature to log in to a Connection Server instance in a domain that is configured to have a one-way trust with the Horizon Client domain without being prompted to reauthenticate.
  • Real-Time Audio-Video and scanner redirection supported in nested mode
    The Real-Time Audio-Video and scanner redirection features are now supported in nested mode. See VMware Knowledge Base (KB) article 67248, "VMware Horizon Guidelines for Nested Mode."
  • Increased display device performance and decreased CPU use
    The Lightweight Protocol Client replaces the vmware-remotemks process, increases display device performance, and decreases CPU use.
  • Improved 3Dconnexion SpaceMouse performance
    Performance is improved when using the 3DConnexion SpaceMouse with the USB redirection feature and the VMware Blast display protocol.
  • Display resolution and display scaling customization for remote desktops
    You can use Horizon Client to customize the display resolution and display scaling for a remote desktop. See Customize the the Display Resolution and Display Scaling for a Remote Desktop.
  • Keyboard shortcuts for input focus
    You can use the Hotkey combination to grab input focus and Hotkey combination to release input focus group policy settings to configure keyboard shortcuts for input focus. You can use the Automatic input focus in a virtual desktop window group policy setting to send input to the remote desktop automatically when a user brings the remote desktop to the front. These features are useful for users who cannot use mouse clicks to grab and release a remote desktop. See General Settings for Client GPOs.
  • Lock key synchronization
    An administrator can synchronize the toggle states of the Num Lock, Scroll Lock, and Caps Lock keys from the client computer to a remote desktop by using the Automatically synchronize the keypad, scroll and caps lock keys group policy setting. See General Settings for Client GPOs. A user can synchronize the toggle states of the Num Lock, Scroll Lock, and Caps Lock keys in the Horizon Client user interface. See Configure Lock Key Synchronization.
  • Certificate checking with an SSL proxy server
    You can allow certificate checking for secondary connections through an SSL proxy server. This feature applies to Blast Secure Gateway and secure tunnel connections. See Setting the Certificate Checking Mode in Horizon Client. See Setting the Certificate Checking Mode in Horizon Client.
  • VMware Blast connections with an SSL proxy server
    You can specify whether to allow VMware Blast connections through an SSL proxy server. See Configure VMware Blast Options.
  • Drive letter mapping in the client drive redirection feature
    An administrator can map drive letters by using the Configure drive letter mapping mode and Define drive letter mapping agent group policy settings. This feature requires Horizon Agent 7.10. See Client Drive Redirection Policy Settings.
  • Browser Redirection support
    Horizon Client supports the Browser Redirection feature, which is introduced with Horizon Agent 7.10. With Browser Redirection, when a user uses the Google Chrome browser in a remote desktop, the website is rendered in the client system instead of the agent system, and it is displayed over the remote browser's viewport. See Configuring Browser Redirection.
  • Multiple webcam and microphone redirection with Real-Time Audio-Video
    When you connect to a virtual desktop, the Real-Time Audio-Video feature redirects all the webcams and microphones connected to the client computer to the virtual desktop. This feature requires Horizon Agent 7.10. This feature does not work with published desktops or published applications. See Using Multiple Devices with the Real-Time Audio-Video Feature.


The user interface and documentation for Horizon Client are available in English, Japanese, French, German, Simplified Chinese, Traditional Chinese, Korean, and Spanish.

Before You Begin

Resolved Issues

  • 1607115: When attempting to use the Real-Time Audio-Video feature on a Surface Pro 4 device, you see only a black screen. This issue occurs because the client needs to be configured to accommodate the default screen resolution for a Surface Pro 4, which is 1920 X 1080.

  • 2394466: If the server is rebooted while a user is running a published application, the application continues to run, but when a user starts a new published application, the user has to re-authenticate and Horizon Client quits. Now, the user still has to re-authenticate, but Horizon Client does not quit.

  • 2385537: If you use the domain\username format when you log in to Horizon Client, and your user name contains an underscore (_) character, you cannot log in.

Known Issues

  • The serial port redirection group policy setting Bandwidth Limit does not set a limit on the bandwidth.

    Workaround: Use third-party software to limit the bandwidth.

  • With serial port redirection, at a high baud rate such as 115200, the performance of VMware Blast is significantly worse than PCoIP, and the connection might sometimes hang.

    Workaround: Use a baud rate of 9600.

  • In an IPv6 environment, if you configure IP address mapping for location-based printing, users might encounter a problem accessing the printer because the client can have multiple IPv6 addresses. Anytime the client connects, it can use any one of the addresses.

    Workaround: Use the location-based printing group policy setting IP Range to include the multiple addresses. However, the printing problem might still occur because the client might use a temporary address, which is not in the specified range.

  • On Windows 7 and Windows Server 2008 R2 desktops, if you remove a drive from being shared on the desktop, Windows Explorer continues to display the removed drive in the guest operating system.

    Workaround: Close and reopen Windows Explorer.

  • On Windows 7 and Windows Server 2008 R2 desktops, if you open files in a shared folder on the desktop, disconnect from the desktop, and reconnect to the desktop, the left navigation pane in Windows Explorer displays duplicate entries for the shared drive.

    Workaround: Close and reopen Windows Explorer.

  • On Windows 7 client systems, you cannot use the Windows Media MMR feature with videos that use Dolby AC3 audio. On Windows 7 clients, Windows Media Foundation does not have the proper codec to support Dolby AC3 audio files. This issue does not occur on Windows 8.x clients.
  • Sometimes the virtual printing feature and location-based printing feature are not able to display the correct list of printers in the Devices and Printers window of a remote, session-based desktop. This issue can occur with desktops provided by Windows Server 2012 RDS hosts. The printers shown within applications are correct, however.

    Workaround: Log off the desktop running on the Windows Server host and reconnect to it.

  • Virtual printing might not work if you connect to a remote desktop using RDP, open Horizon Client on the remote desktop, launch a nested application session, and then log off and log back in to the desktop. When you try to print from the nested application, the expected printer list might not appear. This issue only occurs after you log back in to the desktop.

    Workaround: Reset the application on the remote desktop. To avoid having to set applications, use PCoIP for both ends of the session-in-session connection. That is, use PCoIP to connect to the remote desktop and use PCoIP to connect from within the desktop to the nested application. If you are using location-based printing, you can resolve this issue by closing and reopening the application's print dialog box.

  • If multiple Horizon clients connect to the same RDS desktop or remote application simultaneously and map to a location-based printer with the same name, the printer appears in the first client session, but not in later client sessions. This problem also occurs for client-redirected virtual printers.

    Workaround: For the client sessions in which the printer does not appear, perform a manual refresh. For a remote desktop, press F5 or refresh the Devices and Printers window. For a remote application, close and reopen the application print dialog box. The location-based printer appears in the printer list.

  • If your client operating system is Windows 8.1 and you launch a Microsoft RDP session, pressing Ctrl+Alt+Insert does not send Ctrl+Alt+Del to the remote virtual desktop.

    Workaround: Upgrade the operating system by installing Windows 8.1 Update.

  • If you use a touch-enabled screen on your client system to work in a remote desktop, do not use the Enable Relative Mouse feature. This feature provides improved mouse performance for 3D and CAD applications, but for touch-enabled screens and tablets, the mouse coordinates are not translated properly, even in 3D and CAD applications.
  • If you have multiple monitors with different screen resolutions and expand Horizon Client to all monitors and then select the Enable Relative Mouse feature, occasionally, the mouse pointer might not be able to move downward beyond a certain position.

    Workaround: Press Ctrl+Alt.

  • When a user connects to a desktop using PCoIP shortly after the desktop is powered on, autofit of the desktop window might not work. This issue happens most often if the desktop or network is under stress shortly after power-on (to start multiple applications or to map network drives, for example).

    Workaround: Double-click the desktop window's title to go into window mode and double-click the title bar to go into all-monitor mode.

  • On Windows 10, Windows Fax and Scan hangs when using a CardScan 800 device.

    Workaround: None.

  • When you use the Flash redirection feature to play a video on some websites, such as, you cannot exit full-screen mode because the Exit Full Screen button does not appear in the Flash player toolbar.

    Workaround: Press Ctrl+Alt+Delete and unlock the client side to see the Horizon Client toolbar and then adjust the window size to
    make the Flash player window smaller.

  • When you use the Flash redirection feature to play a video, if you click the Ad link at the bottom of the screen or the More Info link in the Flash player, the advertisment page does not pop up and the playback pauses.

    Workaround: None.

  • If you enable the URL content redirection feature, registry keys and values under HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware VDM\URLRedirection remain after you uninstall Horizon Client.

    Workaround: None.

  • If LockedGuestSize is set to 640x480 on the client machine and you launch a remote desktop in Window - Small mode, the resolution helper tooltip does not appear when you drag the window edge.

    Workaround: None

  • In certain circumstances, opening a local file with File > Open in a remote desktop or remote application causes the guest operating system on the Horizon Agent machine to encounter a STOP error (blue screen) or to stop responding (hang) when client drive redirection (CDR) is used. For more information, see VMware Knowledge Base (KB) article 2149417: Agent machine gets STOP error or stops responding when you open a local file shared with CDR.
  • If you install Horizon Agent and then install Horizon Client on the same Windows machine (a nested mode installation), and you later uninstall Horizon Agent, the client's "log in as current user" function is lost after Horizon Agent is uninstalled. This problem occurs because the wsnotify.dll file is removed after Horizon Agent is uninstalled.

    Workaround: Reinstall Horizon Agent or Horizon Client to bring back the "log in as current user" function.

  • The DPI synchronization feature does not work with a Windows Server 2008 R2 remote desktop.

    Workaround: Install Microsoft Hotfix You cannot change the DPI setting through a Remote Desktop session on a computer that is running Windows 7 or Windows Server 2008 R2 in the remote desktop.

  • If you connect multiple USB devices to the client system, select Automatically connect at startup in Horizon Client, and then connect, disconnect, and quickly reconnect to a remote desktop, not all of the USB devices are redirected to the remote desktop after you reconnect.

    Workaround: Wait for the USB devices to be redirected back to the client machine (for example, wait for the devices to appear in the device manager) and then reconnect to the remote deskop. Alternatively, you can manually redirect any unredirected USB devices to the remote desktop.

  • After you disconnect and reconnect multiple remote desktops, you see an error message that states that an error occurred when connecting a USB device to your remote desktop. This problem typically occurs when multiple USB devices are connected to the client machine and you select Automatically connect at startup in Horizon Client.

    Workaround: Close the error message box and manually redirect the USB devices to the remote desktop.

  • If you use the RDP protocol to connect to a published desktop from a physical machine, and then you try to connect to the same published desktop from a zero client, the RDP session ends on the physical machine and the zero client cannot connect.

    Workaround: Relaunch the same desktop pool with RDP from the physical machine, select Options > Disconnect and logoff in the launched RDP session, and then reconnect to the same desktop pool from the zero client.

  • When you use the client drive redirection feature to share a folder, if the folder name is longer than 117 characters, a red X appears on top of the redirected folder icon in the remote desktop or application.

    Workaround: None.

  • A “Pending session expired” error might occur when you try to connect to a remote desktop with the Microsoft RDP display protocol. This problem only occurs in large-scale environments where a Unified Access Gateway appliance is used and virtual printing is enabled.

    Workaround: Establish a connection to the remote desktop without using a Unified Access Gateway appliance, or disable virtual printing and establish a connection using RDP.

  • When virtual printing is used in Horizon Client, the client processes might not end when you disconnect and close Horizon Client. This problem is caused by a hang that occurs when the virtual printing feature is unloaded.

    Workaround: See VMware Knowledge Base (KB) article 2003626: Disabling virtual printing (ThinPrint) in VMware Horizon Client for Windows.

  • With the clipboard audit feature, the event log reports one byte more than the actual length of the data that was copied from the agent machine to the client machine. For example, if you copy 10 bytes of data from a remote desktop to the client machine, the event log reports "XXX copy 11 bytes CPFORMAT_TEXT data from Horizon Agent to Horizon Client XXX with clipboard." Also, if "\r\n" is in the copied text, the event log records only the length of "\r." For example, if you copy the following text, the audit message records the length as 12 bytes:

    Workaround: None.

  • You cannot use the device bridge feature to redirect fingerprint scanner devices to remote desktops and published applications. When you use the DeviceTester application to test the connected devices in a remote desktop or published application, the error message "Status: Please connect the device first" appears.

    Workaround: None. This problem is a third-party issue.

  • In a 64-bit machine, such as Windows 10, you cannot drag a file from a remote desktop to a local open 32-bit application, such as Notepad.

    Workaround: Drag the file and drop it to the local desktop, and then drag the file to the application window from the local desktop.

  • You cannot drag an email attachment from a remote Outlook application to an email message in a local Outlook application, to the local desktop, or to any local application.

    Workaround: Drag the attached file to the File Explorer from the same session and then drag the file to the local system.

  • When the drag and drop progress bar is displayed, you can still use the remote desktop, but the clipboard redirection feature does not work.

    Workaround: Wait until the drag and drop progress bar is no longer displayed. 

  • When you drag and drop a folder that has a hidden attribute, the folder's hidden attribute is lost at the destination. A file’s hidden attribute is retained.

    Workaround: Manually set the hidden attribute after the drag and drop operation.

  • You cannot drag and drop files or subfolders from different folders at the same time.

    Workaround: Move the files or subfolders into a single folder and then drag and drop the new folder, or drag and drop the files or subfolders in separate drag-and-drop operations.

  • When dragging a file or folder, if the length of the file or folder name exceeds operating system limitations, or if you try to drag a folder that has complex nesting levels, the drag and drop operating might fail.

    Workaround: Shorten the single file or folder name, or package the entire folder into a compressed file that has a shorter name, and drag the modified file or folder.

  • When you drag a file object (for example, an attachment to an email message) from a remote desktop or published application to the client system, if the object cannot be transferred to the client system in 10 seconds, the drag and drop operation fails. This problem can occur because of network bandwidth or latency issues.

    Workaround: Save the object that you are dragging to a file first and then drag and drop the file to the client system.

  • Dragging and dropping an image from the client system to Excel, either in a remote desktop or as a published application, does not work correctly.

    Workaround: Drag and drop the image to a Microsoft Word or Wordpad file first and then drag it to Excel.

  • Dragging and dropping an image and formatted text at the same time does not work correctly.

    Workaround: Drag the image separately, or disable the HTML data format by using the Configure drag and drop formats group policy setting.

  • With the Browser Redirection feature, the context menu options on right click are limited to open link in new tab, open link in new window, back, and forward.

    Workaround: None.