Simplify your VDA Updates with Citrix’s Virtual Delivery Agent Upgrade Service

In the ever-evolving landscape of VDI, keeping your systems updated is crucial for maintaining security, performance, and functionality. Citrix understands this need and offers a solution to simplify the updating process for your Virtual Delivery Agents (VDAs) – the VDA Upgrade Service. This feature is a game-changer for administrators managing Citrix Virtual Apps and Desktops environments. Let’s delve into what this service entails and how it can benefit your organization. The feature was released on May 2023 and is currently widely used by hundreds of Citrix Customers. An alternative to this upgrade service is use of SCCM or Intune. The VDA Upgrade Service is designed to enhance operational efficiency for IT administrators. By eliminating the need for multiple administrators (often across different teams) and complex SCCM or custom scripts, a single Citrix admin can seamlessly complete the entire upgrade process, saving valuable time, effort, and resources. With an intuitive interface via Web Studio, admins can easily initiate VDA upgrades. They can choose to upgrade individual machines or entire machine catalogs, scheduling these upgrades to occur automatically when no active user sessions are present. Additionally, administrators can streamline and automate the process further using PowerShell. A key advantage of the VDA Upgrade Service is its ability to minimize disruptions for end users. By scheduling upgrades during periods of low usage, organizations can reduce downtime and ensure uninterrupted productivity.Manual upgrades often introduce errors and inconsistencies. The VDA Upgrade Service, however, allows administrators to perform upgrades without manual intervention, ensuring a consistent and reliable VDA environment and reducing the potential for human error. Beyond improving operational efficiency and user experience, the VDA Upgrade Service helps organizations stay secure and up to date. By ensuring timely VDA upgrades, organizations can implement the latest security patches, features, functionalities, and enhancements. This proactive approach helps address vulnerabilities and maintains a robust security posture for the IT infrastructure.

What is a Virtual Delivery Agent (VDA)?

A Virtual Delivery Agent, or VDA, is an essential component installed on virtual or physical machines within a Citrix environment. This agent enables the machine to register with a Delivery Controller, making it available as a resource to deliver applications or desktops to users. VDAs are the backbone of Citrix Virtual Apps and Desktops (formerly XenApp and XenDesktop), facilitating seamless user access to applications and desktops.

Purpose of the VDA Upgrade Service

The primary goal of the VDA Upgrade Service is to streamline and automate the process of updating VDAs to newer versions. Regular updates are critical for incorporating the latest features, enhancing performance, and applying security patches. However, manually upgrading multiple VDAs can be time-consuming and prone to errors. This is where the VDA Upgrade Service steps in, offering a more efficient solution.

Key Features and Benefits

1. Automated Updates

The VDA Upgrade Service automates the upgrade process, significantly reducing the need for manual intervention. Automation minimizes the risk of human error and ensures a consistent upgrade process across your environment.

2. Simplified Management

Managing VDAs across a large environment can be daunting. The VDA Upgrade Service simplifies this by providing a centralized management interface, making it easier to keep all agents up to date without extensive manual effort.

3. Minimized Downtime

Downtime can be detrimental, especially in environments where uptime is critical. The VDA Upgrade Service aims to minimize downtime by streamlining the upgrade process, ensuring your systems remain operational during updates.

4. Enhanced Security and Performance

Regular updates are essential for maintaining security and performance. By ensuring that VDAs are consistently updated to the latest versions, the service helps protect your environment against vulnerabilities and ensures optimal performance.

How It Works

1. Assessment

The service begins by assessing the current state of your VDAs to identify the necessary updates. This assessment ensures that each VDA is evaluated and prepared for the upgrade process.

2. Scheduling

Upgrades can be scheduled during maintenance windows to avoid disrupting users. This flexibility allows administrators to choose the most convenient times for updates, minimizing the impact on daily operations.

3. Execution

Once scheduled, the service automates the upgrade process. This involves applying updates to the VDAs as planned, reducing the need for manual input and oversight.

4. Monitoring and Reporting

Post-upgrade, the service provides monitoring and reporting features to ensure the upgrades were successful. These tools help identify and resolve any issues that may arise during the upgrade process.

Integration with Citrix Cloud

The VDA Upgrade Service is integrated with Citrix Cloud, leveraging the cloud management plane to orchestrate upgrades across both on-premises and cloud-hosted environments. This integration provides a centralized interface for managing upgrades, further simplifying the process and offering enhanced control and visibility.

How to set-up the VDA Upgrade Service with Citrix DaaS and Web Studio

Before you get started, ensure that you have the required minimum VDA version: CR 2109 or LTSR 2203 or later.

1. On your MCS golden image, manually provisioned VMs, or physical systems where you have the VDA software or plan to install it, include the VDA Upgrade Agent as part of the Additional Components within the VDA install

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2. In the Web Studio Machine Catalog Setup, enable the VDA Upgrade service and select your preferred VDA track (latest CR or LTSR)

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3. Once the feature has been enabled, select a catalog in the Machine Catalog view. Check the machine details to see if a VDA upgrade is available for that catalog.

  • The VDA Upgrade Service is designed to notify admins when upgrades are available and allow them to choose the appropriate rollout strategy. It will never automatically upgrade VDAs on its own.

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4. Right click on the Machine Catalog you want to upgrade, or the specific machine within the catalog you want to upgrade, and select Upgrade VDA

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5. Choose to upgrade now or schedule the upgrade later.

  • Upgrade will automatically put machine(s) in maintenance mode (you don’t have to do it and shouldn’t per the message to ensure it completes successfully)
  • Upgrade will not work if machine is in an active session, even if it’s disconnected
  • Upgrade will skip machines in a perpetually active state – it will never kick users off

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6. You can confirm or view upgrade status in the machine detail view.

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Before upgrading, ensure that the new VDA versions are compatible with your existing infrastructure and applications. Compatibility checks can prevent potential issues post-upgrade.


Testing upgrades in a staging environment before applying them to production is highly recommended. This practice helps mitigate risks by identifying any issues in a controlled setting.

Policy and Compliance

Adhering to your organization’s policies and compliance requirements regarding software updates is essential. Ensure that the VDA Upgrade Service aligns with these policies to maintain compliance.


The VDA Upgrade Service from Citrix is a valuable tool for administrators looking to simplify the process of keeping VDAs updated. By automating updates, simplifying management, minimizing downtime, and enhancing security and performance, this service ensures a more secure, efficient, and reliable virtual app and desktop delivery environment. Embrace the VDA Upgrade Service to reduce administrative burdens and keep your Citrix environment running smoothly.