Hello, how log does it take for a desktop to become available and complete customisation in your environment? In mine it's more than 2:15 minutes, is this expected?
Publishing the master image W10 in my test environment from start until cloning takes around 10,5 minutes, deploying the desktop with an available status in Horizon takes around 12 seconds.
Note that I've got no additional customization, in a production environment with more Group policy's It takes more than that.
What you can check is the number of computer policy's