Azure Azure Backup

Microsoft Azure Backup Server (MABS): Antivirus Exclusions

Running a solid, constantly updated antivirus product on your servers, like your Microsoft Azure Backup Sever (MABS), 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), MABS is compatible with most antivirus software products. Though, these antivirus products can also affect MABS performance and, if not configured properly, can cause data corruption of replicas and recovery points.

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

  • DPMRA.exe

(full path: C:\Program Files\Microsoft Azure Backup\DPM\DPM\bin\DPMRA.exe)

  • csc.exe (exclude when you experience degraded performance while using the MABS Administrator Console)

(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:\Progam 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

You should configure to delete infected files by default on the MABS servers, 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.


There are a lot antivirus settings you should keep track of when running MABS. I have tried to list all of the exclusions, so hopefully it will help you with getting the most out of your MABS setup.

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