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Microsoft Azure Backup Server: Anti-Virus Exclusions

1:05 pm in Anti-Virus Exclusions, Azure, Azure Backup, Cloud, hybrid cloud, MABS, Microsoft Azure Backup Server by Wim Matthyssen

Running a solid, constantly updated antivirus product on your servers is a necessity to keep a healthy and secure server environment. However, with installing an antivirus product, you also risk having issues with certain workloads and services on those severs. Just like System Center Data Protection Manager (SCDPM), the Microsoft Azure Backup Server (MABS) is compatible with most antivirus software products. Though, the implemented antivirus product can also affect MABS performance and, if not configured properly, can cause data corruption of replicas and recovery points.


So, to avoid file conflicts and to minimize performance degradation between your MABS server and the antivirus software running on top of it, you should disable real-time monitoring by the antivirus software for all of the following processes and directories, which are listed below.

MABS processes to exclude from antivirus real-time monitoring

For information about configuring real-time monitoring based on process name or folder name, check the documentation of your antivirus vendor.

  • DPMRA.exe (*full path: C:\Program Files\Microsoft Azure Backup\DPM\DPM\bin\DPMRA.exe)
  • csc.exe  (*full path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe -> you can also exclude csc.exe in all the other Microsoft.NET Framework folders)
  • cbengine.exe (*full path: C:\Program Files\Microsoft Azure Backup\DPM\MARS\Microsoft Azure Recovery Services Agent\bin\cbengine.exe)






MABS directories in the MABS Program Files folder to exclude from antivirus real-time monitoring

Be aware that when you installed MABS on another drive then “C:”, like in the example below, look under the correct drive for the folders to exclude.

  • C:\Program Files\Microsoft Azure Backup\DPM\DPM\Temp\MTA\*
  • C:\Program Files\Microsoft Azure Backup\DPM\DPM\XSD\*
  • C:\Program Files\Microsoft Azure Backup\DPM\DPM\bin
  • C:\Program Files\Microsoft Azure Backup\DPM\MARS\Microsoft Azure Recovery Services Agent\bin
  • C:\Program Files\Microsoft Azure Backup\DPM\DPM\Cache (*MABS scratch folder)








Delete infected files on the MABS server

As a final remark, I would also advise to configure to delete infected files by default on the MABS server rather than automatically cleaning or quarantining them. Automatic cleaning and quarantining can result in data corruption because these processes cause the antivirus software to modify files, making changes MABS cannot detect.


In summary, there are a lot of antivirus settings you should keep track of when running MABS. I’ve tried to list all of the exclusions, so hopefully it will help you with getting the most out of your MABS setup. If you have any questions, feel free to contact me through my Twitter handle.

Wim Matthyssen (@wmatthyssen)

Microsoft Azure Backup Server: Error when installing on Windows Server 2016 – The Single Instance Store (SIS) component is not installed

3:36 pm in Azure, Azure Backup, hybrid cloud, MABS, Microsoft Azure Backup, Microsoft Azure Backup Server, PowerShell, Public Cloud, SIS, SIS-Limited, Windows Server 2016, WS2016 by Wim Matthyssen

Hi All,

Last week I was contacted by a customer who tried to install Microsoft Azure Backup Server (MABS) on an on-premise Windows Server 2016. However, when he started the installation he always received an error because a prerequisite was not installed, namely the Single Instance Store (SIS) component.


When opening the DpmSetup.log with PowerShell (as Administrator), you could see the following error:



However, when you try to install this missing component through PowerShell it gives you an Error: 0x800f080cFeature name SIS-Limited is unknown.


The reason for this is that because from Windows Server 2016 the SIS-Limited component is replaced by Microsoft’s deduplication or data footprint reduction (DFR) technology, like you can read in the following article from MVP Greg Schulz:

Also, when you go to the Microsoft Azure Backup Server download page and you expand System Requirements you can see that Windows Server 2016 at the present time is not listed as a supported Operating System (OS) to deploy MABS, probably because it does not have this SIS component.



Currently you’re not able to use Windows Server 2016 as OS for you MABS server. Probably in the near future Microsoft will release a new version of MABS which will allow it, but until then you need to stick with Windows Server 2012 (R2) or Windows Server 2008 R2 to install your MABS on.

Hope this helps you with this error.

Wim Matthyssen (@wmatthyssen)