added about availability support

Author: SnehaSudhirG

articles/update-manager/manage-alerts.md

@@ -4,7 +4,7 @@ description: This article describes on how to enable alerts (preview) with Azure
 ms.service: azure-update-manager
 author: SnehaSudhirG
 ms.author: sudhirsneha
-ms.date: 12/22/2023
+ms.date: 04/12/2024
 ms.topic: how-to
 ---
 
@@ -18,6 +18,9 @@ Azure Update Manager is a unified service that allows you to manage and govern u
 
 Logs created from patching operations such as update assessments and installations are stored by Azure Update Manager in Azure Resource Graph (ARG). You can view up to last seven days of assessment data, and up to last 30 days of update installation results.
 
+> [!NOTE]
+> This feature isn't available in Azure US Government and Azure China operated by 21 Vianet.
+
 ## Prerequisite
 
 Alert rule based on ARG query requires a managed identity with reader role assigned for the targeted resources.

articles/update-manager/overview.md

@@ -62,6 +62,9 @@ All assessment information and update installation results are reported to Updat
 
 The machines assigned to Update Manager report how up to date they are based on what source they're configured to synchronize with. You can configure [Windows Update Agent (WUA)](/windows/win32/wua_sdk/updating-the-windows-update-agent) on Windows machines to report to [Windows Server Update Services](/windows-server/administration/windows-server-update-services/get-started/windows-server-update-services-wsus) or Microsoft Update, which is by default. You can configure Linux machines to report to a local or public YUM or APT package repository. If the Windows Update Agent is configured to report to WSUS, depending on when WSUS last synchronized with Microsoft Update, the results in Update Manager might differ from what Microsoft Update shows. This behavior is the same for Linux machines that are configured to report to a local repository instead of a public package repository.
 
+> [!NOTE]
+> WSUS isn't available in Azure China operated by 21 Vianet.
+
 You can manage your Azure VMs or Azure Arc-enabled servers directly or at scale with Update Manager.
 
 ## Prerequisites

articles/update-manager/scheduled-patching.md

@@ -2,7 +2,7 @@
 title: Scheduling recurring updates in Azure Update Manager
 description: This article details how to use Azure Update Manager to set update schedules that install recurring updates on your machines.
 ms.service: azure-update-manager
-ms.date: 02/26/2024
+ms.date: 04/12/2024
 ms.topic: conceptual
 author: SnehaSudhirG
 ms.author: sudhirsneha
@@ -13,7 +13,8 @@ ms.author: sudhirsneha
 **Applies to:** :heavy_check_mark: Windows VMs :heavy_check_mark: Linux VMs :heavy_check_mark: On-premises environment :heavy_check_mark: Azure Arc-enabled servers.
 
 > [!IMPORTANT]
-> For a seamless scheduled patching experience, we recommend that for all Azure virtual machines (VMs), you update the patch orchestration to **Customer Managed Schedules** by **June 30, 2023**. If you fail to update the patch orchestration by June 30, 2023, you can experience a disruption in business continuity because the schedules will fail to patch the VMs. [Learn more](prerequsite-for-schedule-patching.md).
+> - For a seamless scheduled patching experience, we recommend that for all Azure virtual machines (VMs), you update the patch orchestration to **Customer Managed Schedules** by **June 30, 2023**. If you fail to update the patch orchestration by June 30, 2023, you can experience a disruption in business continuity because the schedules will fail to patch the VMs. [Learn more](prerequsite-for-schedule-patching.md).
+> - This feature isn't available in Azure US Government and Azure China operated by 21 Vianet. 
 
 You can use Azure Update Manager to create and save recurring deployment schedules. You can create a schedule on a daily, weekly, or hourly cadence. You can specify the machines that must be updated as part of the schedule and the updates to be installed.