Prior to using the Visual Studio installer plugin, make sure that you have the following installed on your system:
For the install only, you will also need to make sure that you have both the SDK and the .NET framework locations within your path. Typical locations include:
If you have built NMaven locally on your machine, you can just type:
mvn org.apache.maven.dotnet.plugins:maven-vsinstaller-plugin:install
If you have not built NMaven locally and are just looking to use the binary distribution, then check out the instructions here: Install From Remote Repo