Hyper-V does not allow access to a Physical COM Port. Hyper-V does not provide the functionality to associate the virtual COM port to a physical COM port.
However, There is 3rd party software out there that will redirect com ports over the network. To workaround the issue, you may try the following third party tool:
http://www.kernelpro.com/
http://www.fabulatech.com/
Feel free to share other link if you have tested Virtual COM or Serial Port to the community.
