Revise Azure File Sync release notes for version 22.3

Updated the release notes for Azure File Sync version 22.3, including changes to supported agent versions and links to relevant KB articles.

Author: rladbsal

articles/storage/file-sync/file-sync-release-notes.md

@@ -24,7 +24,7 @@ The following Azure File Sync agent versions are supported:
 
 | Milestone | Agent version number | Release date | Status |
 |----|----------------------|--------------|------------------|
-| v22.3 Release - [KB507](https://) |22.3.0.0| April 17, 2026 | Supported
+| v22.3 Release - [KB5087090](https://support.microsoft.com/topic/9728448e-48ed-4746-97be-6a0724683fe7) |22.3.0.0| April 17, 2026 | Supported
 | V22 Release - [KB5056967](https://support.microsoft.com/topic/ded35c33-ff9c-4716-8a8d-a080d1bc067b)|22.0.0.0| December 10, 2025| Supported |
 | V21.2 Release - [KB5063825](https://support.microsoft.com/topic/6490aef8-ebae-465d-beba-718c05f8a71f)|21.2.0.0| July 08, 2025| Supported |
 | v21.1 Release - [KB5063486](https://support.microsoft.com/topic/e0016f74-573d-492c-8bf7-c3be1e380836) |21.1.0.0 | August 11, 2025 | Supported - Security Update |
@@ -64,29 +64,8 @@ The following Azure File Sync agent versions have expired and are no longer supp
 | Pre-GA agents | 1.1.0.0 - 3.0.13.0 | N/A | Not Supported - Agent versions expired on October 1, 2018 |
 
 ### Azure File Sync agent update policy
-
 [!INCLUDE [storage-sync-files-agent-update-policy](../../../includes/storage-sync-files-agent-update-policy.md)]
 
-## Windows Server 2012 R2 agent support
-
-Windows Server 2012 R2 reached [end of support](/lifecycle/announcements/windows-server-2012-r2-end-of-support) on October 10, 2023. **Azure File Sync will continue to support Windows Server 2012 R2 until the v17.x agent expires on June 9, 2025.** After this date, we will no longer provide bug fixes, security updates, or technical support. 
-
-Although official support for Windows Server 2012 R2 and the Azure File Sync v17 agent will end on June 9, 2025, the v17 agent will continue to function until **January 27, 2026**. After this date, servers with the v17 agent will stop syncing to your Azure file shares.
-
-### Action Required
-
-Perform one of the following options for your Windows Server 2012 R2 servers prior to v17 agent expiration on June 9, 2025:
-
-- Option #1: Perform an [in-place upgrade](/windows-server/get-started/perform-in-place-upgrade) to a [supported operating system version](file-sync-planning.md#operating-system-requirements).
-  - Uninstall the Azure File Sync agent and restart the server. [in-place upgrade](/windows-server/get-started/perform-in-place-upgrade)
-  - Perform the in-place upgrade to any supported Windows Server version.
-  - Install the Azure File Sync agent that matches the new operating system.
-  - Allow up to 30 minutes for the Azure portal to reflect the updated server status.
-
->[!Warning]
-> Do not unregister the server before the upgrade. Unregistering removes all server endpoints, and if any data is still tiered, this can leave files orphaned.
-
-- Option #2: Deploy a new Azure File Sync server that's running a [supported operating system version](file-sync-planning.md#operating-system-requirements) to replace your Windows 2012 R2 servers. For guidance, see [Replace an Azure File Sync server](file-sync-replace-server.md).
 
 ## Version 22.3.0.0
 The following release notes are for Azure File Sync version 22.3.0.0 (released April 17, 2026). This release contains improvements for the Azure File Sync service and agent.