Update overview-inbound-outbound-ips.md

-------
cc: @cephalin

Author: msangapu-msft

articles/app-service/overview-inbound-outbound-ips.md

@@ -3,7 +3,7 @@ title: Inbound/Outbound IP addresses
 description: Learn how inbound and outbound IP addresses are used in Azure App Service, when they change, and how to find the addresses for your app.
 ms.author: msangapu
 ms.topic: article
-ms.date: 08/25/2020
+ms.date: 04/05/2023
 ms.custom: "UpdateFrequency3, devx-track-azurepowershell"
 
 ---
@@ -48,10 +48,12 @@ The set of outbound IP addresses for your app changes when you perform one of th
 
 - Delete an app and recreate it in a different resource group (deployment unit may change).
 - Delete the last app in a resource group _and_ region combination and recreate it (deployment unit may change).
-- Scale your app between the lower tiers (**Basic**, **Standard**, and **Premium**), the **PremiumV2**, and the **PremiumV3** tier (IP addresses may be added to or subtracted from the set).
+- Scale your app between the lower tiers (**Basic**, **Standard**, and **Premium**), the **PremiumV2** tier, the **PremiumV3** tier, and the **Pmv3** options within the **PremiumV3** tier (IP addresses may be added to or subtracted from the set).
 
 You can find the set of all possible outbound IP addresses your app can use, regardless of pricing tiers, by looking for the `possibleOutboundIpAddresses` property or in the **Additional Outbound IP Addresses** field in the **Properties** blade in the Azure portal. See [Find outbound IPs](#find-outbound-ips).
 
+Note that the set of all possible outbound IP addresses can increase over time if App Service adds new pricing tiers or options to existing App Service deployments. For example, if App Service adds the **PremiumV3** tier to an existing App Service deployment, then the set of all possible outbound IP addresses will increase. Similarly, if App Service adds new **Pmv3** options to a deployment that already supports the **PremiumV3** tier, then the set of all possible outbound IP addresses will also increase. This has no immediate effect since the outbound IP addresses for running applications do not change when a new pricing tier or option is added to an App Service deployment. However, if applications switch to a new pricing tier or option that wasn't previously available, then new outbound addresses will be used and customers will need to update downstream firewall rules and IP address restrictions.
+
 ## Find outbound IPs
 
 To find the outbound IP addresses currently used by your app in the Azure portal, click **Properties** in your app's left-hand navigation. They are listed in the **Outbound IP Addresses** field.