About DNG floating license
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In the interest of clarifying assumptions: You don't need a separate license server if your DOORS Next Analyst licenses are floating user licenses. You use the Jazz Team Server (this is different for DOORS Next compared to DOORS 9). If you have multiple Jazz Team Servers deployed you can designate one as the license server for all JTSes.
As Daniel said in his final line above - you can designate the JTS from your company production DNG instance as the license server for all your instances. The company DNG server will use its own JTS with no other configuration, and the VM instance will be pointed to the company JTS. When you do this, you'll need to approve this connection on the company server, but then both servers will use the same pool of floating licenses