Yes, I've tried to remove and re-install the USB Controller as EHCI +UHCI. When I add the USB device is get the following warning, "You need virtual USB xHCI controller on this virtual machine to enable USB 3.0 support for the select device. Connecting the device to the existing virtual USB controller may result in an undefined behavior for it."
When I add the USB controller as xHCI is receive the following warning, "This controller is not supported for this guest operating system" and the VM does not boot until removed.
HP does have a driver for USB 3.0 eXtensible Host Controller specific to the DL380 G9, giving me the impression it should work.
The Guest OS is Windows 2008 R2. I want to attempt the xHCI controller again, but always nervous when the VM doesn't boot.
Thank you for your assistance. I'm currently working on the issue and frustrated.