Not Connecting To Windows Mobile Device Center

Question

I want to be able to connect with a Windows Mobile Device through Windows Mobile Device Center, within a Virtual Machine.  When connecting through the Hyper-V Manager and through Remote Desktop, under "Other supported RemoteFX USB devices",
I can see the Symbol USB Sync Cradle.  In the VM, in Device Manager, I don't see a USB connection.  In the VM, I don't see any meaningful errors in the Event Viewer.
Host:  Windows 8.1 Enterprise Hyper-V on a Domain.  Upgraded from Windows 8.1 Pro.  When this computer was originally installed with Windows 8 Pro, Hyper-V was enabled.  I removed Hyper-V, and installed VMWare Player, because I wanted
USB Pass-through.  I then uninstalled VMWare and installed VirtualBox.  Recently, I uninstalled VirtualBox, upgraded to Windows 8.1 Enterprise, and enabled Hyper-V.
Virtual Machine OS: Windows Server 2012 R2 on a Workgroup.  Started out with being a VMWare VM, using VMWare Player.  Moved to VirtualBox.  USB Pass-through was working in both those virtual environments.  Used Disk2VHD to convert the
VM to a VHDX file.
On the Host:
Windows Mobile Device Center is connected to a Motorola Windows Mobile Device (MC959X) sitting in a Symbol USB Cradle.  The OS on the scanner is Windows Embedded Handheld 6.5 Classic CE OS 5.2.29217 (Build 29217.5.3.12.26).  Advanced Networking
(USB to PC) is not enabled.
Enabled RemoteFX. 
In the RDP file, and in the Registry, added the GUID's for:
WPD "{eec5ad98-8080-425f-922a-dabf3de3f69a}";
Windows Mobile "{6AC27878-A6FA-4155-BA85-F98F491D4F33}";
USB Device "{88BAE032-5A81-49f0-BC3D-A4FF138216D6}";
Windows CE USB Device "{25dbce51-6c8f-4a72-8a6d-b54c2b4fc835}";
GUID_DEVINTERFACE_USB_DEVICE "{A5DCBF10-6530-11D2-901F-00C04FB951ED}"
Ran "sfc /scannow"
All Microsoft Updates are current.
What am I missing?

Answer 1

Thank you for your efforts. I have followed those instructions, but I am still not all the way there yet. 
Now, on the Guest, in the Device Manager, under Mobile Devices, I see the Symbol USB Sync.  But Windows Mobile Device Center still does not connect.
In the Application Event Log, these Events  are being generated:
Log Name:      Application
Source:        WcesComm
Date:          12/8/2014 12:45:54 PM
Event ID:      7
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      DansWinServ12R2
Description:
Windows Mobile-based device failed to connect due to Start USB Connection (0x80004005) failure (see data for failure code).
Event Xml:
< Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="WcesComm" />
    <EventID Qualifiers="49152">7</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-12-08T20:45:54.000000000Z" />
    <EventRecordID>7468</EventRecordID>
    <Channel>Application</Channel>
    <Computer>DansWinServ12R2</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Start USB Connection (0x80004005)</Data>
  </EventData>
< /Event>
Log Name:      Application
Source:        Microsoft-Windows-ApplicationExperienceInfrastructure
Date:          12/8/2014 12:45:54 PM
Event ID:      1
Task Category: None
Level:         Warning
Keywords:     
User:          DANSWINSERV12R2\dreisman
Computer:      DansWinServ12R2
Description:
The application (Windows Mobile Device Center 6.1, from vendor Microsoft) has the following problem: To function properly, Windows Mobile Device Center 6.1 must be reinstalled after you upgrade Windows.
Event Xml:
< Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ApplicationExperienceInfrastructure" Guid="{5EC13D8E-4B3F-422E-A7E7-3121A1D90C7A}" />
    <EventID>1</EventID>
    <Version>0</Version>
    <Level>3</Level>
    <Task>0</Task>
    <Opcode>2</Opcode>
    <Keywords>0x8000000000000000</Keywords>
    <TimeCreated SystemTime="2014-12-08T20:45:54.044605800Z" />
    <EventRecordID>7469</EventRecordID>
    <Correlation />
    <Execution ProcessID="4832" ThreadID="4960" />
    <Channel>Application</Channel>
    <Computer>DansWinServ12R2</Computer>
    <Security UserID="S-1-5-21-3621870490-2575533387-1312730109-1001" />
  </System>
  <EventData>
    <Data Name="DBType">15</Data>
    <Data Name="AppNameCount">33</Data>
    <Data Name="AppName">Windows Mobile Device Center 6.1</Data>
    <Data Name="VendorNameCount">10</Data>
    <Data Name="VendorName">Microsoft</Data>
    <Data Name="SummaryCount">102</Data>
    <Data Name="Summary">To function properly, Windows Mobile Device Center 6.1 must be reinstalled after you upgrade Windows.</Data>
    <Data Name="SessionID">1</Data>
  </EventData>
< /Event>
I have reinstalled Windows Mobile Device Center several times.
Any thoughts?