On 10 November, 2026, support for .NET 9 (STS) will end. Your apps that are hosted on App
Service will continue to run, but security updates will no longer be available
and we’ll no longer provide customer service for .NET 9 (STS). Learn more
about App
Service language support.
Required Action
To avoid potential security
vulnerabilities and minimize risk for your App Service apps, follow the steps to upgrade your app to .NET
10 (LTS) before 10 November, 2026.
More Information
If you have questions, get
answers from community experts in Microsoft Q&A. If you have a
support plan and you need technical help, create a support
request.