Custom Image Template for AVD fails because of Windows Update

See attached output log. Is anyone else running into issues deploying an image using the built-in custom image template in AVD?

We are seeing this same issue in mutilple tenants.

[customization_output.log](https://github.com/user-attachments/files/16331789/customization_output.log)

Is doesn't matter whether you choose the windows update script or not. Just selecting any script fails with the same windows update error.

This was using the Windows 11 Enterprise 22H2 + M365 Apps market place image. Choosing the newer 23H2 gives the same error message. It also doesn't matter if you start the image creation from scratch or use an existing image.

I am also using the option of creating a temporary vnet for deployment instead of using an existing vnet just to avoid issues with network access blocks. Everything worked fine until this new patch tuesday cycle.

Start by reviewing the attached customization_output.log alongside the built-in custom image template used for Azure Virtual Desktop deployments. Reproduce the failure with the Windows 11 Enterprise 22H2 or 23H2 marketplace image, with and without the Windows Update script and with a temporary VNet; done means identifying the Windows Update failure and restoring successful image creation.

Written by the indexing model from the issue text.