OpenVPN VDH - Dynamically expanding virtual hard disk

Hey Freelancers, I have a OpenVPN VHD that's running on a Windows 2012 Server (hyper-V). For some reason this was set up as a Dynamically expanding virtual hard disk. The size is now around 40GB un-necessarily. I would like someone to work on this disk maintaining its contents but get it back to a more realistic size which in my experience is around 9GB. I will be expecting the winning bidder to work via Teamviewer or equivalent as I am unable to allow direct access to the VPN server. Please only get in touch if you know how to resolve this issue. I don't have time to waste on this resolution. I'm not interested in agencies either - I prefer to work with individuals with the relevant skills. I look forward to hearing from you soon. Michael