Should use auto_correct, this allows Vagrant to use a different host port if its already taken - like when you have 2 Windows guests running at the same time.
```ruby
config.vm.network :forwarded_port, guest: 3389, host: 3389, id: "rdp", auto_correct: true
config.vm.network :forwarded_port, guest: 5985, host: 5985, id: "winrm", auto_correct: true
```