Horizon – Upgrade to v. 2512

Welcome to my Omnissa Horizon series. The new version of Horizon, 2512, was GA on December 16th 2025. According to the Horizon 8 2512 Release Notes, vSphere 6.5 and vSphere 6.7 are no longer supported, along with several other new features and enhancements. Furthermore there are a lot of changes made due to the rebranding from VMware to Omnissa, as described here: Rebranding Changes in Omnissa Horizon Products (6000681)

IMPORTANT NOTES

• The Horizon 2512 Agent is now supported with both the 2503 ESB Server and the 2512 Server versions. See Compatibility Matrix for Various Versions of Horizon 8 Components for more details.
• Horizon 8 is not supported with vSphere 6.5 or vSphere 6.7, which are both past the end of General Support. Horizon 8 Instant Clones are incompatible with vSphere 6.5 and vSphere 6.7 so you must upgrade to vSphere 7.0 or later before upgrading to Horizon 8 if you are using Instant Clones.
• Horizon 8 support for Nutanix AHV is now generally available

Anyhow, in this section I will describe how I upgraded my Horizon infrastructure to v. 2512. But first, at what point in an upgrade procedure should we upgrade the Horizon Components? According to Omnissa’s official documentation, this should be done as shown below.

Prior to upgrading Horizon, I check out Product Interoperability Matrix to see that my planned upgrade path is supported.

The procedure used for upgrading is as follows:

1. Clients
   • Clients-repository
   • Dell Wyse Horizon Package
2. Load Balancer – HAProxy
3. Connection servers
4. Enrollment Server
5. UAG
6. vSphere (N/A)
   • NVIDIA Host Drivers (N/A)
7. OSOT MDT Plugin
8. Agents:
   1. Windows Agent
      • NVIDIA Guest Driver
   2. Linux Agent
      • NVIDIA Guest Driver
9. GPO-Bundle

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

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.