Fix Windows App Authentication Error 0x80080005 for W365 and AVD

In this post, I will explain how to resolve Windows App authentication error 0x80080005 for AVD and Windows 365 (Cloud PC) and demonstrate how you can deploy the KB5077744 and KB5077793 OOB updates using WSUS, SCCM, and Intune in your organization.

After installing the January 2026 Windows security update (KB5074109), some users experienced authentication error 0x80080005 when connecting to Cloud PC via Windows App. This error was also experienced by users who were using AVD. Microsoft has issued the out-of-band update KB5077744 for Windows 11 25H2/24H2 and KB5077793 for Windows Server 2025 to address this authentication error.

The Windows devices that were patched with January 2026 updates (KB5074109) have been affected by this problem. This update caused a major issue that primarily impacted the authentication process for various Remote Desktop applications on Windows, including the Windows app.

If you have not yet deployed the January 2026 Windows security update and your IT environment includes the affected applications and features, I recommend applying the KB5077744 and KB5077793 OOB updates to your Windows devices instead.

Resolving Windows App Authentication Error 0x80080005

Alright, let’s get to the point. To resolve the authentication error 0x80080005 for Windows app that is causing sign-in failures during Remote Desktop connections, do the following.

1. For Windows 11 25H2/24H2: Install the KB5077744 OOB update
2. For Windows Server 2025: Install the KB5077793 OOB update

Installing KB5077744 OOB Update on Windows 11 25H2/24H2

For Windows 11 25H2/24H2 devices, the KB5077744 OOB update can be installed in different ways that include Microsoft Intune, Configuration Manager, or manually downloading and installing it from Microsoft Update Catalog.

Manual Installation

On Windows 11 devices, you can download the KB5077744 update from the Microsoft Update Catalog and install it manually. Here is how you can do that. Download KB5077793 from Microsoft Update Catalog and place it in a folder (for example, C:/Packages). Open PowerShell as administrator and run the below command.

Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5077744-x64.msu"

Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5077744-x64.msu"

To apply the KB5077744 update using DISM on a running Windows PC, run the following command from an elevated Command Prompt:

DISM /Online /Add-Package /PackagePath:c:\packages\Windows11.0-KB5077744-x64.msu

DISM /Online /Add-Package /PackagePath:c:\packages\Windows11.0-KB5077744-x64.msu

Import KB5077744 OOB update into WSUS

The KB5077744 update is not available in WSUS, which means you will have to wait for it to appear or import it manually into WSUS. I tried importing this update, and it successfully showed up in the WSUS admin console.

Deploy KB5077744 via Configuration Manager

If you have manually imported the KB5077744 OOB update into WSUS, the same update can be deployed using Configuration Manager. Make sure you synchronize the software update once before looking for this update in the console.

Go to Software Library > Software Updates > All Software Updates. Search for KB5077744 update. Right-click the 2026-01 Cumulative Update for Windows 11, version 25H2 for x64-based Systems (KB 5077744) (26200.7627) and select Deploy. Follow the wizard to complete the deployment.

Install KB5077744 via Microsoft Intune

Sign in to the Intune admin center. Go to Devices > Windows > Windows Updates > Quality Updates. Create a new expedite policy and enter a descriptive name for the profile. Select the quality update you would like to expedite, choose the OOB update, and complete the policy.

Note: I have to mention here that the KB5077744 OOB update is still not included in the latest expedited policy yet. When it appears, I will update the below image. If you wish to deploy this update ASAP through Intune, you must deploy the update by wrapping it as a Win32 app.

Another workaround for deploying Windows Update KB5077744 via Intune is to download the .msu file link with the correct KB. Once you have downloaded the update, you can package and deploy it as a Win32 app. This approach has worked for several of my customers, and going forward, this is how you must deploy OOB updates with Intune.

Installing KB5077793 OOB Update on Windows Server 2025

For Windows Server 2025, you can download the KB5077793 update from the Microsoft Update Catalog and install it manually. Here is how you can do that.

Download KB5077793 from Microsoft Update Catalog

Download KB5077793 from Microsoft Update Catalog and place it in a folder (for example, C:/Packages). Open PowerShell as administrator and run the below command.

Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5077793-x64.msu"

Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5077793-x64.msu"

Import KB5077793 into WSUS

The KB 5077793 update is not available in WSUS, which means you will have to wait for it to appear or import it manually into WSUS. I tried importing this update, and it successfully showed up in the WSUS admin console.

Deploy the KB5077793 update using SCCM

If you have manually imported KB5077793 OOB update into WSUS, the same update can be deployed using Configuration Manager. Make sure you synchronize the software update once before searching for it in the console.

To deploy the KB5077793 update using SCCM, navigate to Software Library > Software Updates > All Software Updates. Search for KB50777493 update. Right-click the 2026-01 Cumulative Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5077793) (26100.32234) and select Deploy. Follow the wizard to complete the deployment.

For more help, refer to the guide on deploying software updates using Configuration Manager.