Apologies if I'm missing something really basic here but in all the tutorials I've read that discusses the use of set-fastsearchmetadatamanagedproperty, it mentions how it belongs to the Administration.Schema namespace, but not how to reference this in a PowerShell script if you want to use set-fastsearchmetadatamanagedproperty!? I'm assuming referencing this namespace isn't done by default given the errors I get when running the script (about set-fastsearchmetadatamanagedproperty being an unknown).
Can somebody please give me a point in the right direction regarding the reference of a relevant namespace you want to use in a PowerShell script please?