Azure Local release information

Article
2025-05-28

Important

Azure Local, version 23H2 (releases 2311.2 to 2509) will reach end of support on October 31, 2025. After this date, you won't receive monthly security and quality updates. Support requests will only be available for patching to a supported release.

Important

Azure Arc resource bridge requires solution updates to be applied within one year. This is critical to keep certificates valid and the Azure Local VM functionality working.

To enhance your Azure Local (formerly known as Azure Stack HCI) experience, we periodically release feature updates that introduce new capabilities and improvements. Additionally, Azure Local provides cumulative updates that include monthly quality and security enhancements. These updates are listed for each instance, ensuring your devices remain protected and productive.

To keep your Azure Local solution in a supported state, you have up to six months to install updates, but we recommend installing updates as they're released.

This article provides the release information for Azure Local, including the release build and OS build information.

About Azure Local releases

The Azure Local includes multiple release trains: 2411, 2503, 2504, 2505, and so forth. Each release train after 2411 is either a feature build or cumulative update.

Feature build: The feature update build is the initial version of the software in a release train. Feature releases go beyond quality and security fixes, incorporating product enhancements, including updates for Azure Local services and agents.
Cumulative build: A cumulative update build includes the incremental updates from the most recent feature build.

The following diagram illustrates the feature builds, cumulative updates, and update paths.

Feature release availability timing

Feature release availability dates depend on the model and SKU of the servers in your cluster.

If your cluster supports Solution Builder Extension software updates, you'll receive feature release updates (for example, 2504 or 2510). These updates are available after your hardware vendor completes their validation and confirms the release is ready. This process typically takes a few weeks following the Microsoft release and varies by hardware vendor.

Note

The validation process ensures a reliable update experience for your cluster. It minimizes potential issues and reduces the overall number of updates you need to manage for Azure Local.

Update paths

Existing deployments

For existing deployments, such as the 2411 feature build, you can update to any of the 2411 cumulative update builds. This path includes the 2411.2 and 2411.3 cumulative updates, which are required to update to the 2503 feature build. The 2503 feature build is required to update to the 2504 feature build.

Here's an example:

Update path: 2411 --> 2411.2 --> 2411.3 --> 2503 --> 2504

New deployments

For new deployments, install a feature build directly. For example, you can install the 2504 build which has an OS version 261000.3775 and solution version 12.2504.1001.20. After the installation, you can install the latest cumulative update build (2505) to keep your system up to date.

Note

To keep your Azure Local instance in a supported state, you have up to six months to install updates. For example, if you're running the 2408 feature build, update to a later build within six months.