Omnissa Horizon Client Next Release Notes

This Tech Preview of Horizon Client Next is available for early testing before its official release.
Tech Previews are not intended for production environments.

Horizon Client Next features a new, modern interface design for Horizon Client across Windows, Mac and Linux platforms.

Why the new interface?

For end users: The previous Horizon Client had three different interfaces, that is, one for each platform. That meant users working across multiple devices had to relearn where features were located and how settings worked. Horizon Client Next eliminates this friction, letting you focus on your work instead of hunting for options.

For IT administrators: Managing three different client experiences meant three sets of documentation, three training programs and inconsistent user support issues across platforms. A unified interface reduces training costs, simplifies troubleshooting and makes it easier to roll out new features consistently.

What's New

Modern user interface

• Consistent design language ensuring consistent user experience across Windows, Linux and Mac platforms
• Updated visual elements, including colors, icons, and layouts
• Reorganized settings in a single location with logical groupings

Improved in-session toolbar

• New toolbar within desktop sessions for quick operations
• Drag and reposition the toolbar anywhere on screen
• Pin/unpin for flexible access
• Hide toolbar functionality coming in a future release

Folders - now on Mac and Linux

• Create groupings of desktops for easier management and accessibility
• Previously available only on Windows, now extended to Linux and Mac

Favorites

• Access your most-used resources quickly by favoriting desktops, apps and folders
• All favorites are accessible under a dedicated Favorites section from left navigation

Installation Steps

• 2609: See KB 6001861.
• 2606: See KB 6001705.
• 2603: See KB 6001366.
• 2512: See KB 6001222.

2609 - Resolved Issues

• Screen capture on the client side and screen snipping for offloaded media: the user will get thumbnails of all screens.
• Support for X.509 Certificate and SAML authentication via Unified Access Gateway (UAG) on macOS.
• Workspace ONE mode launch, redirect, and browser handoff support.
• Keyboard shortcut and key combination filtering on the Linux client.
• Group policy enforcement via /etc/omnissa/horizon-mandatory-config and Group Policy objects on Linux.
• The Windows and Linux installers and Windows updater allow users to select between Classic and Next client variants. For fresh installations, only the selected client variant will be installed, removing any existing installations, while upgrades will retain the existing client type. On Mac, fresh installations will install the Classic Client by default, or both Classic Client and Client Next if Client Next is selected; upgrades will install only the Classic Client.
• IT administrators can configure a custom help link/contact footer on client error dialogs via GPO.
• Prevented duplicate backend UAG server icons from appearing in the client server list if multiple UAGs are behind a load balancer.
• Upgraded client core framework to .NET 10.

2606 - Resolved Issues

• ARM64 is now supported for Windows and Linux x64 platforms
• Microsoft Teams - Screen sharing is now supported
• HTML5 Multimedia Redirection (MMR)
• Scanner preference customization support on Linux and Windows
• Retina support available for Mac
• Performance improvement done on high session login time and bandwidth consumption.

2603 - Resolved Issues

• Improved client stability by fixing crashes during launch, disconnect, reconnect, and fullscreen transitions.
• Improved Linux client startup reliability, addressing display and initialization failures.
• Fixed Windows session launch issues, including blank or black screen scenarios.
• Reduced cases of partial desktop rendering and incorrect fullscreen sizing.
• Improved CPU and memory utilization compared to earlier builds.
• Fixed IME input issues, including duplicate characters and inconsistent activation.
• Improved stability of FIDO2 / hardware authentication workflows.
• Expanded CLI support (fullscreen, all monitors, non‑interactive mode, kiosk login).

2609 - Unavailable features

2606 - Unavailable features

2603 - Unavailable features

2512 - Unavailable features

2609 - Known issues and features under development

Display, Scaling, and Resolution

• Fullscreen and monitor changes: Connecting or disconnecting an external monitor during fullscreen may switch the session to windowed mode on Windows and Linux.

  Workaround: Re-enable fullscreen after connecting or disconnecting the monitor.

• Resolution limits: 8K resolution may appear as an option on Linux and macOS, but supported maximums are Windows: 7680 × 4320; Linux/macOS: 3840 × 2160.

  Workaround: Select a supported resolution for the platform. Use up to 7680 × 4320 on Windows and up to 3840 × 2160 on Linux/macOS.

Authentication, URI, and Session Management

• WS1 browser handoff: A SAML2 credential error may appear briefly before browser redirection.

  Workaround: No action required; the message is temporary.

• Session stolen notification: No warning is shown when an active session is taken over by another endpoint.

  Workaround: Monitor active sessions from the admin console or broker logs, and ask users to disconnect and reconnect if unexpected session takeover is suspected.

• URI launch parameters: Some URI launch cases, such as multi-app launch and domain parameter autofill, may not work.

  Workaround: Launch apps one at a time and enter required values manually.

• Nested multi-hop sessions: In VDI-to-RDSH setups, minor toolbar or graphics glitches may appear.

  Workaround: Relaunch the session if the issue persists.

Performance and Security

• CPU usage and start-up time: Heavy workloads may cause high CPU usage and slower start-up in the Avalonia client.

  Workaround: Close unused local and remote applications before launch, avoid starting multiple sessions simultaneously, and restart the client if CPU usage remains high.

Platform-Specific Issues

Windows

• Input and login: Surface Book built-in keyboard may not work on the login screen, and Local IME login indicators may still show English.

  Workaround: Use an external USB keyboard or on-screen keyboard where needed.

• Clipboard and file transfer: Cancelling large copy/paste transfers may not stop immediately, and transfer failures may occur intermittently.

  Workaround: Wait for large transfers to complete before cancelling where possible, split large files into smaller transfers, and retry the transfer after reconnecting if it fails.

• Windowed display behavior: Black border will appear in window mode.

  Workaround: Switch to fullscreen mode or adjust the session/window resolution to better match the local display.

• Login shortcut: First time login shortcut prompt may not get created.

  Workaround: Create the required shortcut manually or relaunch the client and retry shortcut creation.

• Auto-update configuration: The skip auto-update option is not shown as a separate skip button.

  Workaround: Disable “Download updates in the background” in Software Update settings.

• CLI: -installShortcutsThenQuit not working for Windows.

  Workaround: Install or create shortcuts manually through the client UI or deployment tooling.

Linux

• Mandatory config and kiosk launch: Kiosk login parameters may not bypass the login prompt, and the intended VDI may not launch if the desktop name differs from the config file. enableMMR config value does not work.

  Workaround: Verify that the desktop name exactly matches the configuration file, launch the target desktop manually if kiosk launch fails, and configure MMR through supported client settings where available.

• Scaling, resolution and multi-monitor: Display/text scaling above 100%, DPI 2, or resolution changes may cause cropping or black screen areas while the session is active.

  Workaround: Configure display settings and native resolution before launching the session.

• Input and peripherals: External touch input, keyboard input across monitors, and Olympus RS-27 Foot Pedal redirection on RHEL 10 may not work as expected.

  Workaround: Use a standard keyboard/mouse where possible, keep input on the primary monitor, and connect specialised peripherals directly to a supported endpoint or platform.

• Browser, URL and session handling: Titan OAuth may remain on “Authenticating” with Snap Firefox, URL redirection may prompt for credentials, and UAG timeout may show a generic error.

  Workaround: Use a non-Snap browser package where possible, re-enter credentials when prompted, and reconnect through the client after UAG timeout.

• Max resolution restriction in Ubuntu: Irrespective of resolution setting, session will take local display resolution.

  Workaround: Set local display resolution to low before launching the session.

• CLI: --about does not show dialog.

  Workaround: Open the About dialog from the client UI instead of using the CLI option.

macOS

• External monitor and fullscreen: Mouse focus may not move into the desktop after fullscreen shortcut, and third-party video conferencing platform may render the video on the external monitor.

  Workaround: Click inside the session window after entering fullscreen.

• Toolbar inconsistencies: Toolbar may move, show disconnect popups locally, or become partially hidden in multi-monitor or notch-area scenarios.

  Workaround: Reposition the session window, toggle fullscreen off and on, or move the session to a display without a notch area.

• Cursor and pointer: Cursor may stick at the toolbar in fullscreen with relative mouse, or duplicate cursors may appear after switching display modes.

  Workaround: Toggle relative mouse or fullscreen mode, then click back inside the session window.

• Client UI accessibility: Sessions may get stuck on “Loading Desktop” after idle, and some UI or keyboard accessibility issues may occur in dialogs, shortcuts, folders and localized screens.

  Workaround: Disconnect and reconnect the session after idle, and use mouse navigation or default language settings where keyboard or localized UI issues occur.

• Auto-update configuration: The skip auto-update option is not shown as a separate skip button.

  Workaround: Disable “Download updates in the background” in Software Update settings.

• Mac neo support: The display and scaling values do not get applied correctly.

  Workaround: Use an earlier macOS version where proper display and scaling behaviour is required.

2606 - Known issues and features under development

Display and Monitor

• Windowed mode scaling may not apply dynamically. Workaround: Set the desired resolution before launch.

• Selecting the display after launching the Published Application will not move the Application to the selected monitor Workaround: Set the display monitor for Application before launch of the Application and avoid changing the display monitor.

• Resolution and Scaling options are not available when the user selects any of the full-screen options. Workaround: This option is available only when the user selects custom display options

Performance

• No performance limitation.

Authentication

• Launching Workspace ONE is not supported.
  Workaround: On Windows, rename the Client Next executable file to horizon-client to use Workspace ONE Mode.

Platform-Specific Issues

Windows

• Jumplist, URI, and Shortcuts may not work for Horizon Client Next
  Workaround: Rename horizon-client-next to horizon-client. The existing horizon-client binary can be renamed to your choice to avoid conflict.

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in the software update setting.

Linux

• Deleting the logs folder will cause log collection to fail.
  Workaround: Do not delete the logs folder during troubleshooting.

• Windowed scaling/resolution changes are blocked.
  Workaround: Set the desired resolution before launching the client.

• The app dropdown menu in the desktop list may occasionally render incorrectly.
  Workaround: Use the app in windowed mode and avoid maximizing.

• In a multi-monitor setup, the session may get cropped in windowed mode
  Workaround: Use the full-screen display option in a multi-monitor setup

Mac

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in software update setting.

2603 - Known issues and features under development

Display and Monitor

• Windowed mode scaling may not apply dynamically. Workaround: Set the desired resolution before launch.

• Selecting the display after launching the Published Application will not move the Application to the selected monitor Workaround: Set the display monitor for Application before launch of the Application and avoid changing the display monitor.

• Resolution and Scaling options are not available when the user selects any of the full-screen options. Workaround: This option is available only when the user selects custom display options

Performance

• High session counts (~60 sessions) may increase login/launch times and memory usage, cause rendering issues, or make the application unresponsive.
  Workaround: Limit concurrent sessions and monitor system resources. If the application is unresponsive, you can force quit the app and relaunch it.

• The TechPreview app may consume high CPU/memory.
  Workaround: Close unused applications and monitor resource usage.

Authentication

• Launching Workspace ONE is not supported.
  Workaround: On Windows, rename the Client Next executable file to horizon-client to use Workspace ONE Mode.

• FIDO2 authentication is not available.
  Workaround: Use other supported authentication methods.

Platform-Specific Issues

Windows

• Jumplist, URI, and Shortcuts may not work for Horizon Client Next
  Workaround: Rename horizon-client-next to horizon-client. The existing horizon-client binary can be renamed to your choice to avoid conflict.

• Surface Pro wireless keyboard may not highlight the text box or behave as expected.
  Workaround: Use a wired keyboard or standard input devices.

• The shadebar may not be center-aligned.
  Workaround: No workaround exists; you can move the shadebar anywhere on screen.

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in the software update setting.

Linux

• Deleting the logs folder will cause log collection to fail.
  Workaround: Do not delete the logs folder during troubleshooting.

• Windowed scaling/resolution changes are blocked.
  Workaround: Set the desired resolution before launching the client.

• Desktop/app resize may not work as expected; full screen may not be functional when changed from windowed mode after the session is launched.
  Workaround: Use the default window size or full screen before connecting.

• Horizon Client Next app may cause desktop list menu dropdown issues.
  Workaround: Use the app in windowed mode and avoid maximizing.

Mac

• Application Menu options are not available in the Mac Menu bar
  Workaround: Menu options can be used from the settings and the shade bar.

• Last-launched session display size may not be retained.
  Workaround: Use display settings to preserve layout.

• Multimonitor flickering may occur while resizing.
  Workaround: Avoid resizing during active sessions.

• Retina support is limited.
  Workaround: Use standard display settings.

• URL redirection is not supported
  Workaround: None

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in software update setting.

2512 Known issues and features under development

Display and Monitor

• Application scaling and monitor selection changes are not supported after session start.
  Workaround: Set display and scaling preferences before launching the desktop or app.

• Extended monitor support may cause alignment issues, black artifacts, or require resizing to reflect changes.
  Workaround: Use a single monitor or resize the window after connecting.

• On macOS, adding/removing displays during a session may cause crashes or undesired behavior.
  Workaround: Connect all required displays before starting the session.

• On Linux, multiple monitors are not supported, and the display does not scale across multiple monitors.
  Workaround: No workaround exists; please use a single monitor.

Performance

• High session counts (~60 sessions) may increase login/launch times and memory usage, cause rendering issues, or make the application unresponsive.
  Workaround: Limit concurrent sessions and monitor system resources. If the application is unresponsive, you can force quit the app and relaunch it.

• The TechPreview app may consume high CPU/memory.
  Workaround: Close unused applications and monitor resource usage.

Authentication

• Launching Workspace ONE is not supported.
  Workaround: On Windows, rename the Client Next executable file to horizon-client to use WS1 Mode.

• FIDO2 authentication is not available.
  Workaround: Use other supported authentication methods.

Platform-Specific Issues

Windows

• Jumplist, URI, and Shortcuts may not work for Horizon Client Next
  Workaround: Rename horizon-client-next to horizon-client. The existing horizon-client binary can be renamed to your choice to avoid conflict.

• Surface Pro wireless keyboard may not highlight the text box or behave as expected.
  Workaround: Use a wired keyboard or standard input devices.

• The shadebar may not be center-aligned.
  Workaround: No workaround exists; you can move the shadebar anywhere on screen.

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in the software update setting.

Linux

• Deleting the logs folder will cause log collection to fail.
  Workaround: Do not delete the logs folder during troubleshooting.

• Windowed scaling/resolution changes are blocked.
  Workaround: Set the desired resolution before launching the client.

• Desktop/app resize may not work as expected; full screen may not be functional when changed from windowed mode after the session is launched.
  Workaround: Use the default window size or full screen before connecting.

• Horizon Client Next app may cause desktop list menu dropdown issues.
  Workaround: Use the app in windowed mode and avoid maximizing.

Mac

• Application Menu options are not available in the Mac Menu bar
  Workaround: Menu options can be used from the settings and the shade bar.

• Last-launched session display size may not be retained.
  Workaround: Use display settings to preserve layout.

• Multimonitor flickering may occur while resizing.
  Workaround: Avoid resizing during active sessions.

• Retina support is limited.
  Workaround: Use standard display settings.

• URL redirection is not supported
  Workaround: None

• Skip auto-update option is not available with next client.
  Workaround: Use can choose not to enable "Download updates in the background" toggle in software update setting.

Providing feedback

Submit support tickets through your IT administrator or visit the Omnissa Community Forum to ask questions or share general feedback.