---
title: "Customer Advisory: Windows Desktop Agent 4.5.1 and Entra ID-Only Customers"
slug: "customer-advisory-windows-agent-451-and-entra-id-only-customers"
updated: 2025-10-07T21:04:23Z
published: 2025-10-07T21:04:23Z
canonical: "docs.workspot.com/customer-advisory-windows-agent-451-and-entra-id-only-customers"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.workspot.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Customer Advisory: Windows Desktop Agent 4.5.1 and Entra ID-Only Customers

## The Problem

Microsoft has changed the size of the BRPT token used in Entra ID authentication. This change affects Workspot’s Entra ID-Only customers’ ability to sign into their Workspot desktops.

## Are you Affected?

> Most customers are **not** affected.

This issue affects customer with *Workspot’s “Entra ID-Only” selective option,* which allows Entra ID to be used instead of Active Directory on Workspot desktops and application servers.

## The Solution

Windows Desktop Agent 4.5.1 solves this issue.

### Existing Persistent Desktops and Application Servers

Your Workspot desktops and application servers will automatically update starting on October 11, 2025 in the US and October 14, 2025 in the EU.

The release was uploaded to [https://download.workspot.com/WorkspotAgentSetup(4.5.1.2581).msi](https://download.workspot.com/WorkspotAgentSetup(4.5.1.2581).msi) on October 6, 2025.

See [The Workspot Windows Desktop Agent](/v1/docs/workspot-desktop-agent-installation-and-configuration) for more information.

### Templates and New VMs

Your templates need to be updated to use Agent 4.5.1, and these updated templates need to be applied to your desktop pools and application server pools for new VMs to function properly.

#### Prerequisite

This requires the Agent 4.5.1 release binary, available on October 6, 2025 in https://download.workspot.com.

#### Procedure

For each template currently used by a pool:

1. Clone your existing template. This will create a new draft-mode template.
  - See “Clone the Template” in [Using Workspot Templates](/v1/docs/using-workspot-templates#clone-the-template).
2. Sign into the cloned template.
  - See “Signing into the Template” in [Using Workspot Templates](/v1/docs/using-workspot-templates#signing-into-the-template-via-a-jump-server).
3. Install Agent 4.5.1 manually.
  - See “Installing the Agent Manually” in [The Workspot Windows Desktop Agent](/v1/docs/workspot-desktop-agent-installation-and-configuration#installing-the-agent-manually).
4. Apply the template to the pool.
  - See [Control: Applying Updated Templates to Cloud Desktop and Application Server Pools](/v1/docs/control-applying-updated-templates-to-cloud-desktop-and-application-server-pools).

## If You Have Problems

If you encounter this issue before the release dates above, [contact Workspot](/v1/docs/contacting-workspot-support) for assistance.

## Related Document

[The Workspot Windows Desktop Agent](/v1/docs/workspot-desktop-agent-installation-and-configuration)