Windows Server Update Services (WSUS)

Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012

Windows Server Update Services (WSUS) enables information technology administrators to deploy the latest Microsoft product updates. You can use WSUS to fully manage the distribution of updates that are released through Microsoft Update to computers on your network. This article provides an overview of this server role and more information about how to deploy and maintain WSUS.

WSUS Server role description

A WSUS server provides features that you can use to manage and distribute updates through a management console. A WSUS server can also be the update source for other WSUS servers within the organization. The WSUS server that acts as an update source is called an upstream server. In a WSUS implementation, at least one WSUS server on your network must be able to connect to Microsoft Update to get available update information. As an administrator, you can determine, based on network security and configuration, how many other WSUS servers connect directly to Microsoft Update.

Practical applications

Update management is the process of controlling the deployment and maintenance of interim software releases into production environments. It helps you maintain operational efficiency, overcome security vulnerabilities, and maintain the stability of your production environment. If your organization can't determine and maintain a known level of trust within its operating systems and application software, it might have a number of security vulnerabilities that, if exploited, could lead to a loss of revenue and intellectual property. Minimizing this threat requires you to have properly configured systems, use the latest software, and install the recommended software updates.

The core scenarios where WSUS adds value to your business are:

  • Centralized update management
  • Update management automation

Using Windows PowerShell to manage WSUS

For system administrators to automate their operations, they need coverage through command-line automation. The main goal is to facilitate WSUS administration by allowing system administrators to automate their day-to-day operations. By exposing core WSUS operations through Windows PowerShell, system administrators can increase productivity, reduce the learning curve for new tools, and reduce errors due to failed expectations resulting from a lack of consistency across similar operations. The Windows PowerShell cmdlets for WSUS operations add flexibility and agility for the system administrator.

New and changed functionality

Starting March 28, 2023, WSUS supports Unified Update Platform (UUP) updates for Windows 11 version 21H2 clients. For more information, see Plan your WSUS deployment.


The change requires either an update installation, or manually adding MIME types to IIS on WSUS servers. Clients running Windows 11 version 22H2 may fail to install updates from WSUS if the server hasn't been updated. For more information, see Unified Update Platform (UUP) considerations for WSUS.

Changes from WSUS version 3.2

Windows Server Update Services is a built-in server role that includes the following enhancements:

  • Can be added and removed by using the Server Manager
  • Includes Windows PowerShell cmdlets to manage the most important administrative tasks in WSUS
  • Adds SHA256 hash capability for additional security
  • Provides client and server separation: versions of the Windows Update Agent (WUA) can ship independently of WSUS


Upgrade from any version of Windows Server that supports WSUS 3.2 to Windows Server 2012 R2 requires that you first uninstall WSUS 3.2.

In Windows Server 2012, upgrading from any version of Windows Server with WSUS 3.2 installed is blocked during the installation process if WSUS 3.2 is detected. In that case, you will be prompted to first uninstall Windows Server Update Services prior to upgrading your server.

However, because of changes in this release of Windows Server and Windows Server 2012 R2, when upgrading from any version of Windows Server and WSUS 3.2, the installation is not blocked. Failure to uninstall WSUS 3.2 prior to performing a Windows Server 2012 R2 upgrade will cause the post installation tasks for WSUS in Windows Server 2012 R2 to fail. In this case, the only known corrective measure is to format the hard drive and reinstall Windows Server.

In this collection

The following guides for planning, deploying, and managing WSUS are in this collection: