Updates per Cary Chai.

Author: v-jaswel

articles/container-apps/TOC.yml

@@ -294,12 +294,8 @@
   items:
     - name: Architecture overview
       href: networking.md
-    - name: Environments
-      items:
-        - name: Deploy with an external environment
-          href: vnet-custom.md
-        - name: Deploy with an internal environment
-          href: vnet-custom-internal.md
+    - name: Use a custom virtual network
+      href: vnet-custom.md
     - name: Ingress
       items:
         - name: Overview
@@ -333,8 +329,6 @@
           href: how-to-use-private-endpoint.md
         - name: Integrate with Azure Front Door
           href: how-to-integrate-with-azure-front-door.md
-    - name: Use a custom VNET
-      href: vnet-custom.md
 - name: Languages and runtimes
   items:
     - name: .NET

articles/container-apps/vnet-custom-internal.md

@@ -99,7 +99,7 @@ $VnetName = 'my-custom-vnet'
 
 ---
 
-Now create a virtual network to associate with the Container Apps environment. The virtual network must have two subnets available for the container app instance.
+Now create a virtual network to associate with the Container Apps environment. The virtual network must have a subnet available for the environment deployment.
 
 # [Bash](#tab/bash)
 

articles/container-apps/vnet-custom.md

@@ -116,15 +116,15 @@ az network vnet subnet create \
   --resource-group $RESOURCE_GROUP \
   --vnet-name $VNET_NAME \
   --name infrastructure-subnet \
-  --address-prefixes 10.0.0.0/21
+  --address-prefixes 10.0.0.0/23
 ```
 
 # [Azure PowerShell](#tab/azure-powershell)
 
 ```azurepowershell-interactive
 $SubnetArgs = @{
     Name = 'infrastructure-subnet'
-    AddressPrefix = '10.0.0.0/21'
+    AddressPrefix = '10.0.0.0/23'
 }
 $subnet = New-AzVirtualNetworkSubnetConfig @SubnetArgs
 ```