How do you move files/folders across volumes with Powershell?

I try to move a folder with PowerShell

move-item  c:\test c:\test2

works, but

move-item c:\test  \\192.168.1.50\c$\test2

does not and tells me

Move-Item : Source and destination путь должен иметь одинаковые корни. Переехать will not work across volumes.