Application Resilience policies for Omnissa Horizon Client (formerly VMware Horizon Client)

You can activate an Application Resilience policy for Omnissa™ Horizon® Client (formerly VMware Horizon® Client) to collect information about the functional status of Horizon Client installed on your Windows devices and view the results in reports. You can also configure the policy to attempt to repair or reinstall the application.

VMware Horizon Client was renamed to Omnissa Horizon Client in version 8.15. Both are referred to as Horizon Client in this documentation.

Application Resilience policies for Horizon Client are supported on devices running:

  • a supported version of the Windows operating system

  • PowerShell version 5.1 or higher

    Due to PowerShell restrictions imposed by Microsoft, Application Resilience isn't supported for this application on devices running Windows 11 SE.

  • one of the following versions of Horizon Client:

    • 8.15.x or higher (Omnissa Horizon Client)

      Significant software changes in higher versions may cause health checks to become invalid.

    • 5.x to 8.14.x (VMware Horizon Client)

In addition to checking the version, the following table describes the health checks performed:

If you select Report higher versions as Compliant, higher versions report Compliant without running health checks.

Component Test performed
Services Installed Running Signed by

  • Omnissa Horizon Client (horizon_client_service.exe)

  • Horizon EUC USB Arbitration Service (horizon-eucusbarbitrator64.exe)1

  • Omnissa Horizon Scanner Redirection Client (ftscanmgrhv.exe)1

  • Omnissa Horizon Serial Com Redirection Client Service (hznsprrdpwks.exe)1

  • Omnissa Horizon Netlink Supervisor Service (ftnlsv.exe)1

  • Omnissa KSM Session Notifier (ksmNotifier.exe)1

  • Omnissa Experience Management Service (ws1etlm.exe)1

 P P

One of the signers entered in the policy configuration

By default, Signers contains "Omnissa, LLC", "Microsoft Windows Hardware Compatibility Publisher", and "FabulaTech LLP".
Drivers Installed Running Signed by

  • Omnissa hznucmon (hznucmon.sys)1

  • Horizon Client Protect Driver (hznprotect.sys)1

  • Omnissa Windows Session Monitor (omnksm.sys)1

 P P

One of the signers entered in the policy configuration

By default, Signers contains "Omnissa, LLC", "Microsoft Windows Hardware Compatibility Publisher", and "FabulaTech LLP".
Application name

The application uses one of the following names:

  • VMware Horizon Client

  • Omnissa Horizon Client

1 Only checked if selected in the policy configuration

In addition to checking the version, the following table describes the health checks performed:

If you select Report higher versions as Compliant, higher versions report Compliant without running health checks.

Component Test performed
Services Installed Running Signed by
VMware Horizon Client (horizon_client_service.exe) P P

One of the signers entered in the policy configuration

By default, Signers contains "VMware, Inc.".
Application name

The application uses one of the following names:

  • VMware Horizon Client

  • Omnissa Horizon Client

You can configure an Application Resilience policy for Horizon Client to enable the Application Resilience (RAR) component A lightweight software component of the Secure Endpoint Agent that detects the status of third party applications installed on a device. The component may also attempt to repair the third party application if it is non-compliant. The RAR component is deployed on a device only when the device is associated with a customized policy group and that policy group's Application Resilience policy is activated. to attempt to repair Horizon Client if it's not functioning, or reinstall it if it's missing or can't be repaired.

Depending on the Absolute product licenses associated with your account, the Report and repair and Report, repair, and reinstall options may not be available.

The RAR component of the Secure Endpoint Agent can respond to the following issues:

Issue Resolution
Repair

One of the following services isn't running:

  • Omnissa Horizon Client (horizon_client_service.exe)

  • Horizon EUC USB Arbitration Service (horizon-eucusbarbitrator64.exe)1

  • Omnissa Horizon Scanner Redirection Client (ftscanmgrhv.exe)1

  • Omnissa Horizon Serial Com Redirection Client Service (hznsprrdpwks.exe)1

  • Omnissa Horizon Netlink Supervisor Service (ftnlsv.exe)1

  • Omnissa KSM Session Notifier (ksmNotifier.exe)1

  • Omnissa Experience Management Service (ws1etlm.exe)1

The RAR component restarts the service.

One of the following services isn't installed and the service's executable can be detected on the device:

  • Omnissa Horizon Client (horizon_client_service.exe)

  • Horizon EUC USB Arbitration Service (horizon-eucusbarbitrator64.exe)1

  • Omnissa Horizon Scanner Redirection Client (ftscanmgrhv.exe)1

  • Omnissa Horizon Serial Com Redirection Client Service (hznsprrdpwks.exe)1

  • Omnissa Horizon Netlink Supervisor Service (ftnlsv.exe)1

  • Omnissa KSM Session Notifier (ksmNotifier.exe)1

  • Omnissa Experience Management Service (ws1etlm.exe)1

The RAR component reinstalls the missing service.

One of the following drivers isn't running:

  • Omnissa hznucmon (hznucmon.sys)1

  • Horizon Client Protect Driver (hznprotect.sys)1

  • Omnissa Windows Session Monitor (omnksm.sys)1

The RAR component restarts the driver.

One of the following drivers isn't installed and the driver's executable can be detected on the device:

  • Omnissa hznucmon (hznucmon.sys)1

  • Horizon Client Protect Driver (hznprotect.sys)1

  • Omnissa Windows Session Monitor (omnksm.sys)1

 The RAR component reinstalls the missing driver.
Reinstall

Downgrades are not supported. If the version installed on a device is higher than the expected version, no action is taken.

One of the following services isn't installed and the service's executable cannot be detected on the device:

  • Omnissa Horizon Client (horizon_client_service.exe)

  • Horizon EUC USB Arbitration Service (horizon-eucusbarbitrator64.exe)1

  • Omnissa Horizon Scanner Redirection Client (ftscanmgrhv.exe)1

  • Omnissa Horizon Serial Com Redirection Client Service (hznsprrdpwks.exe)1

  • Omnissa Horizon Netlink Supervisor Service (ftnlsv.exe)1

  • Omnissa KSM Session Notifier (ksmNotifier.exe)1

  • Omnissa Experience Management Service (ws1etlm.exe)1

The RAR component downloads and installs the configured version of the application.

One of the following drivers isn't installed and the driver's executable cannot be detected on the device:

  • Omnissa hznucmon (hznucmon.sys)1

  • Horizon Client Protect Driver (hznprotect.sys)1

  • Omnissa Windows Session Monitor (omnksm.sys)1
Horizon Client failed to be repaired, or the expected version isn't installed

1 Only checked if selected in the policy configuration

Issue Resolution
Repair
The VMware Horizon Client (horizon_client_service.exe) service isn't running

The RAR component restarts the service.
The VMware Horizon Client (horizon_client_service.exe) service isn't installed and the service's executable can be detected on the device

The RAR component reinstalls the missing service.
Reinstall

Downgrades are not supported. If the version installed on a device is higher than the expected version, no action is taken.
The VMware Horizon Client (horizon_client_service.exe) service isn't installed and the service's executable cannot be detected on the device

The RAR component downloads and installs the configured version of the application.
Horizon Client failed to be repaired, or the expected version isn't installed

The installer:

  • must be an EXE file

  • can have any file name

The RAR component looks for the following files names when checking pre-cached installers:

Component File name
Installers

Omnissa_Horizon_Client.exe (for versions 8.15.x or higher)

VMware_Horizon_Client_Setup.exe (for versions 5.x to 8.14.x)

Before you activate an Application Resilience policy, you need to configure the policy. You need to configure the application version and components to be monitored in addition to the settings in Configuring Application Resilience policies.

To configure the application version and monitored components:

  1. Under Application version, select 8.15.* or higher.

  2. Under Omnissa Horizon Client (formerly VMware Horizon Client) version, enter the version of Horizon Client you expect to be running on your devices.

    • The target version must be a sequence of digits separated by a period.

    • You can use wildcard "*" characters after the major version, for example, 8.15.* or 8.15.0.*.

    Make sure the version you are entering is consistent with version 8.15.x or higher.

  3. Under Select services of the Omnissa Horizon Client application needed to be monitored, select the Horizon Client-related components applicable to your organization that the RAR component should monitor.

If you selected the Report, repair, and reinstall option, you also need to configure these settings in addition to the settings in Configuring Application Resilience policies.

To configure the Horizon Client specific settings:

  1. [Optional] To only reinstall the application if it's missing, select the checkbox next to Do not reinstall or upgrade if the app is already installed. When this option is selected, the application is not reinstalled when either of the following conditions apply:

    • The application version is lower than the expected version.
    • The application can't be repaired.

  2. [Optional] Under Additional installer commands, enter the applicable command-line parameters to configure any settings not covered by the policy configuration. For more information about the available command line parameters, see the Horizon Client documentation.

Before you activate an Application Resilience policy, you need to configure the policy. You need to configure the application version in addition to the settings in Configuring Application Resilience policies.

To configure the application version:

  1. Under Application version, select 5.* to 8.14.*.

  2. Under Omnissa Horizon Client (formerly VMware Horizon Client) version, enter the version of Horizon Client you expect to be running on your devices.

    • The target version must be a sequence of digits separated by a period.

    • You can use wildcard "*" characters after the major version, for example, 5.* or 5.5.*.

    Make sure the version you are entering is consistent with version 5.x or higher.

If you selected the Report, repair, and reinstall option, you also need to configure these settings in addition to the settings in Configuring Application Resilience policies.

To configure the Horizon Client specific settings:

  1. [Optional] To only reinstall the application if it's missing, select the checkbox next to Do not reinstall or upgrade if the app is already installed. When this option is selected, the application is not reinstalled when either of the following conditions apply:

    • The application version is lower than the expected version.
    • The application can't be repaired.

  2. [Optional] Under Additional installer commands, enter the applicable command-line parameters to configure any settings not covered by the policy configuration. For more information about the available command line parameters, see the Horizon Client documentation.