Update file-sync-release-notes.md

Author: jeffpatt24

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

@@ -5,7 +5,7 @@ services: storage
 author: wmgries
 ms.service: azure-file-storage
 ms.topic: conceptual
-ms.date: 08/08/2024
+ms.date: 09/03/2024
 ms.author: wgries
 ---
 
@@ -21,6 +21,7 @@ The following Azure File Sync agent versions are supported:
 
 | Milestone | Agent version number | Release date | Status |
 |----|----------------------|--------------|------------------|
+| V19 Release - [KB5040924](https://support.microsoft.com/topic/e44fc142-8a24-4dea-9bf9-6e884b4b342e)| 19.1.0.0 | September 3, 2024 | Supported - Flighting |
 | V18.2 Release - [KB5023059](https://support.microsoft.com/topic/613d00dc-998b-4885-86b9-73750195baf5)| 18.2.0.0 | July 9, 2024 | Supported |
 | V18.1 Release - [KB5023057](https://support.microsoft.com/topic/961af341-40f2-4e95-94c4-f2854add60a5)| 18.1.0.0 | June 11, 2024 | Supported - Security Update |
 | V17.3 Release - [KB5039814](https://support.microsoft.com/topic/97bd6ab9-fa4c-42c0-a510-cdb1d23825bf)| 17.3.0.0 | June 11, 2024 | Supported - Security Update |
@@ -71,6 +72,82 @@ Perform one of the following options for your Windows Server 2012 R2 servers pri
 >[!NOTE]
 >Azure File Sync agent v17.3 is the last agent release currently planned for Windows Server 2012 R2. To continue to receive product improvements and bug fixes, upgrade your servers to Windows Server 2016 or later.
 
+## Version 19.1.0.0
+
+The following release notes are for Azure File Sync version 19.1.0.0 (released September 3, 2024). This release contains improvements for the Azure File Sync service and agent.
+
+### Improvements and issues that are fixed
+
+- Faster server provisioning and improved disaster recovery for Azure File Sync server endpoints.
+	- We're reducing the time it takes for the new server endpoint to be ready to use. When a new server endpoint is provisioned, it could take hours and sometime days for the server to be ready to use. With our latest improvements, we've substantially shortened this duration for a more efficient setup process.
+	- The improvement applies to the following scenarios, when the server endpoint location is empty (no files or directories):
+		- Creating the first server endpoint of new sync topology after data is copied to the Azure File Share.
+		- Adding a new empty server endpoint to an existing sync topology.
+	- How to get started: Sign up for the public preview [here](https://forms.office.com/r/gCLr1PDZKL).
+- Sync performance improvements
+	- Sync upload performance has improved, and performance numbers will be posted when they are available. This improvement will mainly benefit file share migrations (initial upload) and high churn events on the server in which a large number of files need to be uploaded, for example ACL changes.
+- Miscellaneous reliability and telemetry improvements for cloud tiering and sync
+
+### Evaluation Tool
+
+Before deploying Azure File Sync, you should evaluate whether it's compatible with your system using the Azure File Sync evaluation tool. This tool is an Azure PowerShell cmdlet that checks for potential issues with your file system and dataset, such as unsupported OS version. For installation and usage instructions, see [Evaluation Tool](file-sync-planning.md#evaluation-cmdlet) section in the planning guide.
+
+### Agent installation and server configuration
+
+For more information on how to install and configure the Azure File Sync agent with Windows Server, see [Planning for an Azure File Sync deployment](file-sync-planning.md) and [How to deploy Azure File Sync](file-sync-deployment-guide.md).
+
+- The agent installation package must be installed with elevated (admin) permissions.
+- The agent isn't supported on Nano Server deployment option.
+- The agent is supported only on Windows Server 2019, Windows Server 2016 and Windows Server 2022.
+- The agent installation package is for a specific operating system version. If a server with an Azure File Sync agent installed is upgraded to a newer operating system version, the existing agent must be uninstalled. Restart the server and then install the agent for the new server operating system (Windows Server 2016, Windows Server 2019, or Windows Server 2022).
+- The agent requires at least 2 GiB of memory. If the server is running in a virtual machine with dynamic memory enabled, the VM should be configured with a minimum 2048 MiB of memory. See [Recommended system resources](file-sync-planning.md#recommended-system-resources) for more information.
+- The Storage Sync Agent (FileSyncSvc) service doesn't support server endpoints located on a volume that has the system volume information (SVI) directory compressed. This configuration will lead to unexpected results.
+- All supported Azure File Sync agent versions use TLS 1.2 by default and TLS 1.0 and 1.1 are not supported. Starting with v18 agent version TLS 1.3 will be supported for Windows Server 2022.
+
+### Interoperability
+
+- Antivirus, backup, and other applications that access tiered files can cause undesirable recall unless they respect the offline attribute and skip reading the content of those files. For more information, see [Troubleshoot Azure File Sync](/troubleshoot/azure/azure-storage/file-sync-troubleshoot?toc=/azure/storage/file-sync/toc.json).
+- File Server Resource Manager (FSRM) file screens can cause endless sync failures when files are blocked because of the file screen.
+- Running sysprep on a server that has the Azure File Sync agent installed isn't supported and can lead to unexpected results. The Azure File Sync agent should be installed after deploying the server image and completing sysprep mini-setup.
+
+### Sync limitations
+
+The following items don't sync, but the rest of the system continues to operate normally:
+
+- Azure File Sync v17 agent and later supports all characters that are supported by the [NTFS file system](/windows/win32/fileio/naming-a-file) except invalid surrogate pairs. See [Troubleshooting guide](/troubleshoot/azure/azure-storage/file-sync-troubleshoot-sync-errors?toc=/azure/storage/file-sync/toc.json#handling-unsupported-characters) for more information.
+- Paths that are longer than 2,048 characters.
+- The system access control list (SACL) portion of a security descriptor that's used for auditing.
+- Extended attributes.
+- Alternate data streams.
+- Reparse points.
+- Hard links.
+- Compression (if it's set on a server file) isn't preserved when changes sync to that file from other endpoints.
+- Any file that's encrypted with EFS (or other user mode encryption) that prevents the service from reading the data.
+
+> [!NOTE]
+> Azure File Sync always encrypts data in transit. Data is always encrypted at rest in Azure.
+
+### Server endpoint
+
+- A server endpoint can be created only on an NTFS volume. ReFS, FAT, FAT32, and other file systems aren't currently supported by Azure File Sync.
+- Cloud tiering isn't supported on the system volume. To create a server endpoint on the system volume, disable cloud tiering when creating the server endpoint.
+- Failover Clustering is supported only with clustered disks, but not with Cluster Shared Volumes (CSVs).
+- A server endpoint can't be nested. It can coexist on the same volume in parallel with another endpoint.
+- Don't store an OS or application paging file within a server endpoint location.
+
+### Cloud endpoint
+
+- Azure File Sync supports making changes to the Azure file share directly. However, any changes made on the Azure file share first need to be discovered by an Azure File Sync change detection job. A change detection job is initiated for a cloud endpoint once every 24 hours. To immediately sync files that are changed in the Azure file share, use the [Invoke-AzStorageSyncChangeDetection](/powershell/module/az.storagesync/invoke-azstoragesyncchangedetection) PowerShell cmdlet to manually initiate the detection of changes in the Azure file share.
+- The storage sync service and/or storage account can be moved to a different resource group, subscription, or Microsoft Entra (formerly Azure AD) tenant. After moving the storage sync service or storage account, you need to give the Microsoft.StorageSync application access to the storage account (see [Ensure Azure File Sync has access to the storage account](/troubleshoot/azure/azure-storage/file-sync-troubleshoot-sync-errors?toc=/azure/storage/file-sync/toc.json#troubleshoot-rbac)).
+
+> [!NOTE]
+> When creating the cloud endpoint, the storage sync service and storage account must be in the same Microsoft Entra tenant. After you create the cloud endpoint, you can move the storage sync service and storage account to different Microsoft Entra tenants.
+
+### Cloud tiering
+
+- If a tiered file is copied to another location by using Robocopy, the resulting file isn't tiered. The offline attribute might be set because Robocopy incorrectly includes that attribute in copy operations.
+- When copying files using Robocopy, use the /MIR option to preserve file timestamps. This will ensure older files are tiered sooner than recently accessed files.
+
 ## Version 18.2.0.0
 
 The following release notes are for Azure File Sync version 18.2.0.0 (released July 9, 2024). This release contains improvements for the Azure File Sync agent. These notes are in addition to the release notes listed for version 18.0.0.0 and 18.1.0.0.