Horizon – Upgrade Horizon GPO Bundle to v. 2503

Release date: May 22nd 2025

Welcome to my Omnissa Horizon series. In this session I will describe how I upgraded my Omnissa Horizon GPO Templates to v.2503. According to the Release Notes below, the new version comes with changed GPO templates, due to name change. Accordingly, the GPO-settings has to be adjusted after implementing the new templates in Active Directory.

Horizon 8 2506 Release Notes

Upgrading the GPO templates is done as step 12 in the supported update sequence.

I start out by downloading the Horizon GPO Bundle from Omnissa Customer Connect

Previously I’ve done this manually, but this time I will be doing the admx-upgrade from my management server, using the PowerShell script below. The workflow of the script is as follows:

Prerequisites:

• Permissions to write to SYSVOL PolicyDefinitions folder
• Run script in Administrative Powershell session

Hz-copyAdmx.ps1

# Horizon Admx Upgrade script

$installDir = "C:Install"
New-Item -Path $installDir -type directory -Force

$HzBundle = "<network-path>Omnissa-Horizon-Extras-Bundle*.zip"
Expand-Archive -Path $HzBundle -DestinationPath $installDir

$admxDestination = '<network-path>PolicyDefinitions'

Copy-Item -Path $installDir*.admx -Destination $admxDestination -Recurse -Force
Copy-Item -Path $installDiren-US*.adml -Destination $admxDestinationen-US -Recurse -Force

Remove-Item –path $installDir –Recurse -Force

This concludes my session about upgrading the Horizon GPO Templates to v. 2503. According to the supported upgrade path from Omnissa, this is the final step in upgrading Horizon. With this done, I can log in and test that everything works as expected.

Horizon 8 Documentation:

• Horizon 8 Release Notes
• Horizon 8 Docs

Omnissa Documentation:

• Rebranding Changes in Omnissa Horizon Products (6000681)
• Horizon 8 Upgrade Overview
• Product Interoperability Matrix
• Omnissa Product Documentation

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Horizon – Upgrades

Horizon planning, deployment etc.

Disclaimer: Every tips/tricks/posting I have published here, is tried and tested in different it-solutions. It is not guaranteed to work everywhere, but is meant as a tip for other users out there. Remember, Google is your friend and don’t be afraid to steal with pride! Feel free to comment below as needed.