App Service availability zone

Question

Created an App Service plan by enabling zone redundancy. Now want to disable zone redundancy to save costs. How to disable it for an existing app service plan? Any workarounds, if no direct option?

Answer 1

Hello @AzureUser-9588

Unfortunately it is not possible to disable App Service plan zone redundancy for an existing app service plan.
You will need to create new single-zone App Service plan and migrate WebApp from zone redundant App Service plan into new single-zone App Service plan.

Downtime will depend on how you choose to redirect traffic from your old availability zone enabled App Service to your new App Service.
If you're using an Application Gateway, a custom domain, or Azure Front Door, downtime will be dependent on the time it takes to update those respective services with your new app's information. Alternatively, you can route traffic to multiple apps at the same time using a service such as Azure Traffic Manager and only fully cutover to your new apps when everything is deployed and fully tested.

https://learn.microsoft.com/en-us/azure/availability-zones/migrate-app-service

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