UPD disk does not attach to VMs when a DVD drive is configured in Windows Server 2016

Consider the following scenario:

• You set up a virtual desktop infrastructure (VDI) environment that's based on a Generation 2 virtual machine (VM) in Windows Server 2016.

• The VM has a DVD drive that's configured in a location next to the hard disk drives on the SCSI controller. Generally, this is "location 2."

• You configure the VDI environment to use a User Profile Disk (UPD).

• You log on to the desktop.

In this scenario, the profile disk does not attach to the VM. Therefore, a temporary user profile is incorrectly used. Also, the following event is logged in the event log:

Log Name:      Microsoft-Windows-TerminalServices-TSV-VmHostAgent/Operational
Source:        Microsoft-Windows-TerminalServices-TSV-VmHostAgent
Date:          
Event ID:      8479
Task Category: Configuration
Level:         Warning
Keywords:      
User:          NETWORK SERVICE
Computer:      
Description:
Remote Desktop Virtualization Host could not run the Hyper-V WMI job.

Error description: '' failed to add device 'Synthetic Disk Drive'. (Virtual machine ID )

'': Cannot attach storage media to the controller because the specified location is in use. (Virtual machine ID )
See also Hyper-V event logs
Hresult: 0x80078007

To work around this issue, remove the DVD drive or reconfigure it to another location.