Indeed, cmd.exe doesn’t work with UNC path names and probably never will.
In theory, it should work with a mapped network drive, i.e. you have to map the path to a network drive letter so that a path like \\SUPERNAS\TEAM_ALEX\PROJECTS
becomes T:\
.
But it seems that certain platforms exhibit a bug and still don’t work because they somehow resolve it back into a UNC path.
See the below discussion for a similar problem: