Azure Sphere 21.05 will not be released - 21.06 coming in June

Azure Sphere will not release an updated OS or SDK for 21.05. Therefore, there will not be a 21.05 evaluation period and the Retail Eval feed will continue to deliver 21.04 until we publish 21.06 in June.

In approximately 2 weeks, we will still publish a roundup of updated documentation, samples, and gallery items.

For more information on Azure Sphere OS feeds and setting up an evaluation device group, see Azure Sphere OS feeds and Set up devices for OS evaluation.

For self-help technical inquiries, please visit Microsoft Q&A or Stack Overflow. If you require technical support and have a support plan, please submit a support ticket in Microsoft Azure Support or work with your Microsoft Technical Account Manager. If you would like to purchase a support plan, please explore the available Azure support plans.