If you want to use a custom device image, you can add it into your Azure subscription and then use it for provisioning Cloud PCs. You can use standard Azure Marketplace gallery images or create your own custom managed image. If you currently use an Azure Compute Gallery in Microsoft Azure, you can convert one of those images into a managed image. To convert, use the steps to export an image version to a managed disk and then create an image from a managed disk.
Note
Windows 10 and Windows 11 images should not contain Azure Virtual Desktop client components. Additionally, you can't import Windows 10 and Windows 11 Multisession images into Windows 365.
A Shared Image Gallery simplifies custom image sharing across your organization. Custom images can be used to bootstrap deployment tasks like preloading applications, application configurations, and other OS configurations.