[new ms.service] update ms.service

Author: markingmyname

articles/cost-management-billing/reservations/understand-azure-data-explorer-reservation-charges.md

@@ -4,7 +4,7 @@ description: Learn how the reservation discount is applied to Azure Data Explore
 author: pri-mittal
 ms.author: primittal
 ms.reviewer: orspodek
-ms.service: azure-data-explorer
+ms.service: cost-management-billing
 ms.topic: conceptual
 ms.date: 01/15/2026
 ms.custom: kr2b-contr-experiment

articles/cost-management-billing/reservations/understand-cosmosdb-reservation-charges.md

@@ -3,7 +3,7 @@ title: Understand reservation discount in Azure Cosmos DB
 description: Learn how reservation discount is applied to provisioned throughput (RU/s) in Azure Cosmos DB.
 author: pri-mittal
 ms.author: primittal
-ms.service: azure-cosmos-db
+ms.service: cost-management-billing
 ms.topic: conceptual
 ms.date: 01/15/2026
 ---