The Azure Sphere 20.03 release is now available via the retail evaluation feed, which is meant for backwards compatibility testing. Use it to verify production-signed applications against the new release before it's deployed broadly via the retail feed. If you encounter problems, please notify us immediately through your Microsoft technical account manager (TAM) so that we can address any issues. Microsoft engineers and Azure Sphere community experts will also respond to product-related questions on our MSDN forum and development questions on Stack Overflow.
For more information on how to install the 20.03 release on your devices during the evaluation period, please read our post on the Internet of Things on Microsoft Tech Community.