Azure Sphere OS feeds
Important
This is the Azure Sphere (Legacy) documentation. Azure Sphere (Legacy) is retiring on 27 September 2027, and users must migrate to Azure Sphere (Integrated) by this time. Use the Version selector located above the TOC to view the Azure Sphere (Integrated) documentation.
Microsoft deploys cloud updates for the Azure Sphere OS through system software feeds. The Retail OS feed provides our software that is ready for production use. The RetailEval OS feed provides OS software two weeks before its release to the Retail OS feed, so that you can verify compatibility before broad deployment. Each time we release the OS to either feed, we will notify you through the usual channels.
Applications that are built with production APIs are compatible with updated OS releases. Beta features, however, may change from one release to the next.
Default device groups are associated with an OS feed. If you create your own device group by using the azsphere device-group create command, you can specify the appropriate OS feed. Cloud application deployments to connected devices at end-user sites should always use the Retail feed.
We recommend that you assign devices to a device group that depends on the RetailEval OS feed to ensure that your production-signed applications continue to operate as expected when running on the Retail Evaluation OS during the two-week period. During this period, Microsoft will be monitoring device telemetry for quality and any concerns that you report to Microsoft will be addressed to ensure a quality Retail OS release.
Important
Contact your Microsoft Technical Account Manager (TAM) immediately if you encounter any compatibility problems so that we can assess and address the problem before we release the OS software to the Retail feed.