Components Backed Up by the Windows File System Agent

You can backup the data that resides on your client computer and restore it when required. The following components are backed up by the Windows File System Agent.


What Is Backed Up

File System

  • Thumb drives are not backed up.

  • Locked files (files that are locked by applications or system programs while they are in use) are backed up using snapshots.

File Allocation Table (FAT) file systems

New Technology File Systems (NTFS)

Transactional File Systems

Distributed File System (DFS) data

Oracle ASM Cluster File System (Oracle ACFS)

Resilient File System (ReFS) on Windows Server 2012

USB drives that are fixed disks

Cluster Shared Volumes are backed up only if the cluster is configured using Commvault

Data Deduplication-Enabled Volumes

File System Elements

Universal Naming Convention (UNC) Paths

Mount Points

Encrypted files

Compressed Data

Shared Volumes

Share with Macintosh data

Single Instance Storage

Remote Storage Service

System State

  • System State is backed up automatically for the default subclient. For more information on how to enable System State on user-defined subclients, see Configuring System State Backups.

  • Offline files will not get backed up if the client computer has Unified Extensible Firmware Interface (UEFI).

System File Protection catalog and files

Performance monitor configuration files

Active Directory



SYSVOL (if this is a domain controller)

Certificate Services database (if this is a certificate server)

Cluster database (if this server is part of a cluster)

COM+ database

Terminal Server Licensing database

RSM database

WMI database




UDDI (only with Windows Server 2003 using VSS)

Disk quota information

Event logs

Content Indexing catalogs

Network Policy Server (NPS)

1-Touch Component

Task Scheduler

Quorum data on the physical node of the cluster

Lync Server

  • Lync data and settings - You must enable the OCS backup and configure a subclient for Lync Server. For more information, refer to Configuring Backup of Communication Server.

  • Lync Metadata - Use SQL Server iDataAgent to backup the OCS Metadata.

Office Communication Server (OCS)

  • OCS Data

  • OCS Settings

  • OCS Metadata - Use SQL Server iDataAgent to backup the OCS Metadata.

Encryption Tool

Volumes using BitLocker encryption are backed up if the volume is unlocked.

You must not run scheduled backups unless the volumes using Bitlocker encryption are unlocked.

Third-Party Software encrypted data

Data encrypted using McAfee Endpoint Encryption.

Additional Notes

  • Data from the Web Server on Windows Server 2012 is not backed up.

  • Response File Group Configuration is not backed up when you back up the Lync Server. For more information about backing up Response File Group Configuration, refer to

  • By default, the directory junction point is backed up but the source data (data linked to junction point) is not backed up. This prevents undesired backup and restore of system created directory junction points. To back up the source data of a junction point that is not part of a subclient contents, the source data must be explicitly added to a subclient's content.

  • Some system executable files are backed up through System State backups.