Getting Started with the Datto Windows Agent



This article describes system requirements for the Datto Windows Agent. For a technical overview of the Datto Windows Agent, see One Take: A Look at the Datto Windows Agent.


  • Datto Windows Agent



The current version of the Datto Windows Agent is You can check your protected machine's installed version from the Protect tab of your Datto appliance's GUI. For release notes, see Datto Windows Agent: Software Release Notes.

The Datto Windows Agent automatically updates itself when a new version becomes available, except when the release includes a driver update. Because a driver update requires an update and reboot of the host system, you will need to download and install these versions manually. You can download the latest releases of the Datto Windows Agent at the Datto Download Page.

If your protected machine does not have regular internet access, you will have to manually check for updates to upgrade to newer versions.


The Datto Windows Agent has been tested for compatibility with the following operating systems:

  • Windows XP Service Pack 3
  • Windows Server 2003 Service Pack 2
  • Windows Server 2008 Service Pack 2
  • Windows Server 2008 R2 Service Pack 1 and later
    • Includes Windows Small Business Server 2011
  • Windows 7 Service Pack 1
  • Windows 8
  • Windows 8.1
  • Windows 10
  • Windows Server 2012
  • Windows Server 2016
  • Windows Server 2019
Compatibility of this backup solution with any hypervisor environment or operating system not listed in this article is untested and may yield unreliable results.
  • The Datto Windows Agent is incompatible with Acronis True Image and Acronis Disk Director. Ensure that neither product is present on the protected system before attempting to install the Datto Windows Agent.

See System Requirements For Windows-Based Backup Solutions for additional compatibility statements.


  • Do not install the Datto Windows Agent on any system currently protected by the ShadowSnap Agent, even if the ShadowSnap Agent is no longer installed. Installing the Datto Windows Agent will start a new backup chain for the protected system and will not continue your existing ShadowSnap chain
  • Before installing the Datto Windows Agent, disable or remove all other backup software from the production machine. When removing, use a high-level uninstaller that removes all traces of the program after deployment, including registry keys, DLLs, and stray folders. These components can cause conflicts.
  • Due to their mobile nature, Datto does not endorse or support backing up laptops. Laptops must be inside the LAN, and not on a wireless network, to perform backups in a timely manner. Attempts to back up laptops are at your own discretion. Because of this, and due to the wide range of touchpad drivers, custom drivers, and hardware configurations available for both laptops and all-in-one workstations, restoration support for these platforms is 'best-effort' only.
  • The Datto Windows Agent can only back up volumes that are recognized by the Windows operating system as logical, stable volumes. It cannot back up mapped network drives, iSCSI targets that are not attached as a logical volume, or removable drives.
  • The Datto solution is capable of backing up multiple types of disk sector schemes. The process writes an image-based backup to a file which is 512 bytes per physical sector. While rare, certain software which relies on advanced formats, such as 4K, may have issues with the sector size change. Datto recommends performing regular DR tests to ensure that all required applications function as expected in our virtualized environment.
  • ReFS and FAT32 filesystems are currently unsupported.

System Requirements

Protected Machine Hardware Requirements

  • At least 10% of the volume must be free at time of install, so we may create a file in the root of the volume to handle block transport during transfers. This is a common requirement among backup agents so that the agent has sufficient space to track and block-transfer changes for subsequent backups.
  • The Datto Windows Agent requires 10% free space (up to 10 GB) per volume, with the exception of volumes over 1 TB, which will use 1% of the total free disk space.
  • In both sizing scenarios, an additional 2 GB of free space for operational overhead is required.
  • At least 1GB of RAM must remain free during normal operations of the production machine for install and backups to run.
  • The production machine must use an NTFS filesystem.

Antivirus Requirements

  • Set service-level exceptions for the Datto Backup Agent and Datto Provider services.
  • Set an application-level exception for the Datto Windows agent (DattoBackupAgent.exe).
  • Whitelist the following installation path: %PROGRAMFILES%\Datto\Datto Windows Agent\

Networking Requirements

The following are the minimum networking requirements your environment must meet to support the Datto Windows Agent. For a complete overview of Datto's networking requirements, see the SIRIS, ALTO And DNAS Networking & Bandwidth Requirements article.

  • Gigabit connections from the Datto appliance to all relevant network infrastructure. For best results, the Datto appliance should be connected to a gigabit switch whenever possible.
  • The protected machine must have Internet access, and be able to reach, for the initial installation of the Datto Windows Agent.
  • Ensure connectivity is available through all active firewalls from the protected machine to the Datto appliance on the following ports:
    • Port 3260 (for iSCSI), port 3262 (for MercuryFTP), and TCP 25568.
    • From the Datto appliance to the protected machine: TCP port 25568.
      • The Datto Windows Agent uses MercuryFTP as its primary transport method; however, if this fails, backups are intended to fall back to iSCSI.
    • From the Datto appliance to the Internet: ports 22, 80, 123, 443 outbound to at minimum the addresses specified in this article.

Figure 1 illustrates the data flow for the Datto Windows Agent solution.

Figure 1: Datto Windows Agent logical data flow (click for larger image)


Before installing the Datto Windows Agent, to ensure an issue-free setup experience, review our Windows Pre-Deployment Configurations and Best Practices guide. Then, follow the steps in the Installing the Datto Windows Agent article to deploy the agent to your production machine.

Additional Resources

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