Para obter os pontos de montagem no sistema operacional Windows, considere a leitura da propriedade DeviceID do win32_mappedlogicaldisk ou você pode usar Get-PSDrive < talvez também.
Get-PSDrive -PSProvider FileSystem
Mais recursos
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Win32_MappedLogicalDisk
DeviceID
Data type StringDeviceID is an address or other identifying information to uniquely name the logical device.
Name
Data type StringThe Name property defines the label by which the object is known. When subclassed, the Name property can be overridden to be a Key property.