Hi TekoaSupport,
Welcome to MSDN forum.
According to your description, I suppose it is not supported. As I know, the TLS 1.2 is recommended to use by default, you can refer to the following link to enforce different TLS versions to meet your requirement:
https://docs.microsoft.com/en-us/azure/app-service/configure-ssl-bindings#enforce-tls-versions
BTW, since our forum focuses on .NET Framework Setup and Servicing, for questions about TLS, please report in the
Stack Overflow tagged azure-web-app-service for a more professional support. Thank you for your understanding.
Hoping everything goes well.
Sincerely,
Anna
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