Addressing correctness

Author: nzthiago

articles/azure-functions/azure-functions-az-redundancy.md

@@ -29,9 +29,9 @@ Function apps are zonal services, which means that function apps can be deployed
 
 ## Availability zone considerations
 
-When using availability zones, all of your available function app instances are enabled and processing events. When a zone goes down, Functions detects lost instances and automatically attempts to find new replacement instances, when needed. [Elastic scale behavior](functions-premium-plan.md#rapid-elastic-scale) still applies. However, in a zone-down scenario there's no guarantee that requests for additional instances can succeed, since back-filling lost instances occurs on a best-effort basis.
+All of the available function app instances of function apps configured as zone redundant are enabled and processing events. When a zone goes down, Functions detect lost instances and automatically attempts to find new replacement instances, when needed. [Elastic scale behavior](functions-premium-plan.md#rapid-elastic-scale) still applies. However, in a zone-down scenario there's no guarantee that requests for additional instances can succeed, since back-filling lost instances occurs on a best-effort basis.
 
-Applications that are deployed in an Premium plan that has availability zones enabled continue to run even when other zones in the same region suffer an outage. However, it's possible that non-runtime behaviors could still be impacted from an outage in other availability zones These impacted behaviors can including Premium plan scaling, application creation, application configuration, and application publishing. Zone redundancy for Premium plans only guarantees continued uptime for deployed applications.
+Applications that are deployed in a Premium plan that has availability zones enabled continue to run even when other zones in the same region suffer an outage. However, it's possible that non-runtime behaviors could still be impacted from an outage in other availability zones. These impacted behaviors can include Premium plan scaling, application creation, application configuration, and application publishing. Zone redundancy for Premium plans only guarantees continued uptime for deployed applications.
 
 When Functions allocates instances to a zone redundant Premium plan, it uses [best effort zone balancing offered by the underlying Azure Virtual Machine Scale Sets](../virtual-machine-scale-sets/virtual-machine-scale-sets-use-availability-zones.md#zone-balancing). A Premium plan is considered _balanced_ when each zone has either the same number of VMs (± 1 VM) in all of the other zones used by the Premium plan.