Microsoft Azure Backup Server v3

Microsoft Azure Backup

The System Center teams has released a new version of Microsoft Azure Backup Server (MABS). For who ignore what is it, MABS is a product to protect your environment on-premises with the possibility to create a short-term retention locally and a long-term retention in Azure through Backup Vault. MABS is free for all Azure Backup users and this is not a bad thing. Behind the scenes we have Data Protection Manager but, to simplify the model, there are some pros, like the possibility to use SQL Express (instead SQL Standard) for the other hand there’s no way to use tape library. The v3 introduce many new features:

Backup Storage Migration: By using volume-to-volume migration in MABS v3, you can move your backups on-premises for more optimized storage management. You can also move your data source to a different volume if a volume is near capacity and cannot be extended.

Prevent Unexpected Data Loss: Assigning wrong volumes for backup storage can cause critical data loss. MABS v3 lets you disable such volumes by using Windows PowerShell. All volumes and mount points, except System Volumes, are available for MABS storage.

Custom Size Allocation: Modern Backup Storage (MBS) optimizes storage consumption by using storage when it is necessary. After you configure MABS for protection, it calculates the size of data that is being backed up. When multiple data are backed up together, this calculation can take a while. By using MABS v3, you can configure MABS to accept the storage volume size as default, instead of calculating the size of each file and folders that’s being backed up.

Optimized CC for RCT VMs: MABS v3 optimizes network and storage consumption by transferring only the changed data during any Consistency Checks for RCT (the native change tracking in Hyper-V) VMs.

VMware VM Protection Improvements: VMware VM backup was in Preview mode in Windows Server 2016 that has MABS v2 installed. By using MABS v3, this is supported in production mode. MABS v3 will include support for vCenter/vSphere and ESX/ESXi licensed version 6.5, 6.0, and 5.5.

TLS 1.2 Support: TLS 1.2 is a secure method of communication that is recommended by Microsoft. For MABS, TLS 1.2 is applicable for protecting workloads to cloud.

SQL Server 2017 Support: MABS v3 can be installed together with Microsoft SQL Server 2017. You can either upgrade your SQL Server from SQL Server 2016 to SQL Server 2017 or use a fresh instance of SQL Server 2017 as an MABS database. By using v3, you can seamlessly back up the SQL Server 2017 workload.

Windows Server 2019 Support: MABS v3 can be installed on Windows Server 2019. You can upgrade your system to Windows Server 2019 either before you upgrade or install MABs v3 or a later version.


This update fixes the following issues:

  • No billing for protected collocated VMWare data sources in MABS v2.
  • MAB server crashes while sending billing information for a clustered data source.
  • Indefinite looping of RCT VM consistency check jobs because of I/O errors.
  • When you create a protection group, MABS displays a warning message about exceeding data limits. This issue occurs even for small data sources when you are protecting Hyper-V virtual machines.
  • The MABS UI stops responding after it starts if there are many recovery points for data sources.
  • Hyper-V backups fail because of checkpoint time-outs on the Hyper-V server.
  • MABS console crashes when the nightly pruning job runs for a long time.
  • MABS status report does not display client/laptop recovery points.
  • Consistency checks for Hyper-V VMs transfers more data than the size of the VMs.
  • When you try to recover files and folders from Azure, some items that have a path length longer than 256 characters in the online recovery point are not visible in the UI.
  • The UI stops responding for several minutes when a consistency check job is triggered.
  • Severity is lowered from “Critical” to “Informational” for the alert that is raised when an online backup fails because new disk backups are present since the last online backup.
  • BMR and System State data source backups consume more storage when you use Modern Backup Storage.
  • Alternate synchronization jobs for files and folders on a deduped volume raise failed file alerts incorrectly.  Failed files log links in failed file alerts do not show the failed files.

Get Started

Download Microsoft Azure Backup Server v3