Web Server: System Requirements

The following requirements are for the Web Server.

Operating System

Use the latest version of the operating system software listed in the Operating System table. Commvault software fully supports the latest version of an operating system until the vendor ends support. Newer versions of Commvault software might not install on operating systems for which vendor support has ended. For information about the Microsoft support lifecycle, go to the Microsoft Support website, Microsoft Support Lifecycle. For support lifecycle information for other operating systems, contact the appropriate software vendor.

Operating System

Windows Server 2019

Microsoft Windows Server 2019 Editions

Microsoft Windows Server 2019 Core Editions

Windows 2016

Microsoft Windows Server 2016 Editions

*Nano Servers are not supported. See Considerations for Microsoft Windows Server 2016 for more information.

Windows 2012

Microsoft Windows Server 2012 Editions

Microsoft Windows Server 2012 R2 Editions*

*Core Editions are not supported.


All Windows-compatible processors are supported.

Additional Software

  • If you use an Exchange agent, install Microsoft Outlook x64 Editions to support Exchange email recovery.
  • If you use the Domino Mailbox Archiver, install Notes Client Release 8 or higher to support Domino email recovery.

Restore Cache Directory

Minimum of 500GB is required for the restore cache directory. The exact requirements may vary depending on the number of users accessing the Web Console to download files or perform Export and Legal Hold operations.

Hardware Specifications

The hardware requirements for Web Server installed on either physical or virtual machines is explained in Hardware Specifications for Web Server.


  • The software installation requires 30 GB of disk space for Microsoft SQL Server application and database and 20 GB of temp space on the drive where the temp directory resides.
  • The job results directory for the File System agent that is installed on the Web Server should have enough space to cache the search restores from users. This depends on the number of files that may be restored, disk quota, and the retention period configured by the administrator.
  • In time, you may need to provide additional space (several GB) to allow for growth in the Web Server database. The size of the metadata depends on the search operation performed and quantity of data stored.

Cluster - Support

The software can be installed on a Cluster if clustering is supported by the above-mentioned operating systems.

For information on supported cluster types, see Clustering - Support.

Database Engine

Microsoft SQL Server 2016 Express Edition is automatically installed during the installation of the Web Server software. If you have Microsoft SQL Server 2012 Enterprise Edition already installed in your environment, the Web Server will use the existing SQL Server.

For more information, see Database Engine under System Requirements - CommServe.


The File System Agent is installed automatically during the installation of this software component (if it is not installed already). To review the system requirements of the File System Agent, see System Requirements - Microsoft Windows File System Agent.

Note: To successfully restore NAS data and Domino emails on the web, install a 32-bit File System proxy instance on a 64-bit machine.

Compliance Search

The operating system locale of the Web Server must be set to English (United States). If you change the system locale, you must restart the Web Servercomputer.

Outlook Add-In and ContentStore Email Viewer

The following requirements must be met to use Web Server with the Outlook Add-In and Outlook Add-In with ContentStore Email Viewer:

  • Use a dedicated Web Server when you deploy Outlook Add-In with ContentStore Email Viewer on more than 400 mailboxes.
  • Microsoft Outlook with the latest service pack. Also, to take advantage of Web Server capabilities from the Outlook Add-In, make sure that the latest service pack for Microsoft Outlook is installed on the client where Outlook Add-In is installed.
  • Microsoft Outlook 2007 or later, or IBM Notes. NOTE: The 32-bit applications on a 64-bit server will require a second 32-bit File System agent. For x64, use Microsoft Outlook 2010 or later.
  • Microsoft Outlook must be installed on the MediaAgent computer to perform content indexing of Exchange and IBM Notes data.
  • Upgrade all Exchange clients and Outlook Add-In users to Commvault Version 11.

.NET Framework

Microsoft .NET Framework 4.6 is required and is automatically installed.

.NET Core Hosting Bundle

Microsoft .NET Core Hosting Bundle 2.1.13 is required and is automatically installed.

Note: If it is necessary to upgrade the .NET Core Hosting Bundle to the latest version, run ASP.NET Core Runtime 2.1.x.


Third-party maintenance (minor) releases or feature releases that are supported by the Commvault software may not be listed in our System Requirements. When possible, Commvault provides information on any known issues related to these minor releases or feature releases. In some cases, these minor releases or feature releases affect how the Commvault software works. Commvault software may experience changes in functionality as the result of the third-party minor release or feature releases. These changes are beyond the control of Commvault. Platforms that are supported in the current version of Commvault software may not be supported in earlier versions of the software. Contact your software provider to ensure that third-party minor releases or feature releases are compatible with the Commvault software.

Additional considerations regarding minimum requirements and End-of-Life policies from third-party vendors also apply.

Last modified: 9/3/2020 3:33:04 AM