You can use PuTTY to access the RPI3
Or you can use the PoSH-SSH module to do the same.
So let’s give it a try :
If you connect using this command
New-SSHSession -ComputerName YourRPI3
Don’t use a domain notification for the user, but just the user name.
But further then this you can’t get … in this version of PoSH-SSH, so best use the famous PuTTY tool to connect.