Generally Available: New Availability Zone Features for Azure App Service

Enhanced Availability Zone support for Azure App Service is now generally available. This update simplifies the pre-requisites to enable zone resilience, reduces the cost of running in high availability, and enhances reliability and resilience for your apps. 
Key Updates

• Reduced minimum instance requirement for enabling Availability Zones from three to two, while still maintaining a 99.99% SLA.
• Some App Service plans with two or more instances may be able to automatically support Availability Zones without additional setup.
• The zone redundant setting for App Service plans and App Service Environment v3 is now mutable throughout the life of the resources.
• Enhanced dashboard for visibility into Availability Zone information, including physical zone placement and zone counts.
• Eliminates minimum instance fee for App Service Environment v3. 

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