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

Co-authored-by: Ken Downie <[email protected]>

Author: rladbsal

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

@@ -67,7 +67,7 @@ Although official support for Windows Server 2012 R2 and the Azure File Sync v17
 
 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). Before upgrading, uninstall the Azure File Sync agent and restart the server. ***Do not unregister the server and re-register server during OS upgrade, or it will lead to orphaned tiered files on existing server endpoints.*** Then, perform the in-place upgrade to the new version of Windows Server, such as 2016, 2019, 2022, or 2025. After the upgrade is complete, install the Azure File Sync agent that matches the new operating system version. Once the agent is installed on the upgraded server, the Azure portal should reflect the correct server status within 30 minutes.
+- 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). Before upgrading, uninstall the Azure File Sync agent and restart the server. ***Don't unregister and re-register the server during the OS upgrade, or it will lead to orphaned tiered files on existing server endpoints.*** Then, perform the in-place upgrade to the new version of Windows Server, such as 2016, 2019, 2022, or 2025. After the upgrade is complete, install the Azure File Sync agent that matches the new operating system version. Once the agent is installed on the upgraded server, the Azure portal should reflect the correct server status within 30 minutes.
 
 - 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).