Mandatory update for Microsoft Azure Recovery Services Agent: November 2017

Applies to: Azure Backup


This article describes key updates, new features, improvements, and fixes for Azure Backup for Microsoft Azure Recovery Services (MARS) Agent version 2.0.9099.0, which is used by Microsoft Azure Backup and Microsoft Azure Site Recovery (ASR) for transferring data to Azure.

Key update

System State Backup is generally available

System State backup with MARS Agent is now generally available in all Azure regions. With this release, the MARS Agent has full production support for protecting data and operating system configuration on Windows file servers, Active Directory, and IIS web servers that are hosted on any Windows Server version from Windows Server 2008 R2 to Windows Server 2016.

Microsoft Azure Backup

Select items to backup

By using System State Backup, you can protect your Active Directory servers, file servers, and IIS web servers for comprehensive disaster recovery. If you already back up files and folders, you can easily add System State to your policy without much effect on the size of backups that you send to Azure. Learn more about how you can get started backing up and recovering system state by using MARS Agent.

New features

Flexible backup schedule and retention policy for System State

Now you can configure daily backups for System State at a preferred time directly from the Mars Agent. You can also set retention ranges for your daily, weekly, and monthly system state backups.

Specify Backup Schedule

Select Retention Policy

PowerShell support for System State backups

PowerShell support is available for configuration, backup, and recovery of System State so that you can automate protection of Windows Server configuration at scale.

Improvement and issues fixed in this update

  • Fixes an issue that leads to backup failure in Windows 10 clients that have the RS3 Fall Creators Update installed. In this case, you receive the following error message:

    Screenshot of the error message:

    KB 4048992 error message
  • Fixes an issue that leads to failure in the backup of compressed or encrypted files. In this case, you receive the following error message:
  • Fixes an issue that prevents users of Offline backup in System Center Data Protection Manager and Azure Backup Server from modifying offline backup parameters after an offline backup job is configured.
  • Includes several accessibility fixes and improvements.

Update information

To apply this update, install the latest version of the Microsoft Azure Recovery Services Agent.

The following file is available for download from the Microsoft Download Center:

Download the Azure Recovery Services agent update package now.

Note The version number for this update of Microsoft Azure Recovery Services Agent is 2.0.9099.0.

For more information about how to download Microsoft support files, see the following Microsoft Knowledge Base article:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Applying the update to multiple servers

If your servers are registered to one or more Recovery Services Vaults, you can update your servers directly from Azure portal. Follow these steps to update multiple servers from the Azure portal:

  1. Download the installer package (see link above).

  2. Navigate to the Recovery Services Vault where your servers are registered.

  3. On the Settings blade, click Backup Infrastructure in the "Manage" section.

  4. Click Protected Servers under "Management Servers" and select Azure Backup Agent as the Backup Management Type.

    Select Backup Management Type

  5. On the blade that appears, click on a server for which the Agent version number is lower than 2.0.9099.0.

  6. On the server’s detail blade, click Connect. A Remote Desktop Connection file will be downloaded that you can use to connect to the server, copy the update installer, and then run the installer to update the MARS Agent on the server.

    click Connect screen

  7. When you're done updating, you can select other servers that have Agent versions that are earlier than 2.0.9099.0 and update the Agents on those servers in the same manner.

Restart information

If you are using Windows Server 2008 (SP2 and R2 SP1, any version), you must restart the computer after applying this update. Users who installed MARS Agent on other Windows Server versions don’t need to restart the computer after applying this update.

Replacement information

This update replaces previously released update, KB 4041236.


If you use System Center 2016 Data Protection Manager (SC DPM), Microsoft recommends that you apply Update Rollup 1 for System Center 2016 Data Protection Manager or a later version.

If you use System Center 2012 R2 Data Protection Manager (SC DPM), apply Update Rollup 12 for System Center 2012 R2 Data Protection Manager or a later version.


Learn about the terminology that Microsoft uses to describe software updates.