As far as I've read up on this you've taken all the steps, maybe you can check with this document
However you might also checkout Veeam 9.5 that has just been released, it has Nimble integration and I've been testing it for a month now and it is awesome.
You do need a Veeam enterprise plus license which is a bit expensive.
I have this same setup with a physical box for Veeam with NWT. NWT is supposed to disable the Automount feature in Windows but if you are worried just run this from command prompt - nomount /N
This will turn off Automount for you. As stated you can also use 9.5 for Nimble snapshot integration but ENT+ required.