Merge pull request #296988 from joexumsft/xuxu/add_downgrade

[Azure App Configuration] Add downgrade support

Author: v-ccolin

articles/azure-app-configuration/faq.yml

@@ -105,8 +105,10 @@ sections:
         answer: |
           You can upgrade an App Configuration store at any time, for example, from the Free tier to the Standard or Premium tier, or from the Standard tier to the Premium tier.
           
-          You can't downgrade an App Configuration store, for example, from the Premium tier to the Standard tier, or from the Standard tier to the Free tier. However, you can create a new store in the desired tier and then [import configuration data into that store](howto-import-export-data.md).
+          You can downgrade an App Configuration store from the Premium tier to the Standard tier, as both tiers are designed for production usage. However, downgrading to a non-production tier, such as the Free tier, is not supported. To achieve this, you can create a new store in the desired tier and then [import configuration data into that store](howto-import-export-data.md).
           
+          Before downgrading an App Configuration store from the Premium tier to the Standard tier, ensure that your usage of regular storage and snapshot storage is below the limits of the Standard tier. You can verify your current usage through the [Azure Monitor metrics](monitor-app-configuration.md#analyzing-metrics), Daily Storage Usage and Snapshot Storage Size, of your App Configuration store in the Azure portal.
+
       - question: Where does data stored in App Configuration reside? 
         answer: |
           Customer data stored in App Configuration reside in the region where the customer's App Configuration store was created. Customer data is replicated to another region only if the customer enables [geo-replication](./concept-geo-replication.md) for that region. This applies to all available regions. Customers may move, copy, or access their data from any location globally.