Yes, I did the following from a SQL Agent PowerShell job step:

$src = "\\serverpath\filename"

$dst = "e:\path\filename"

Copy-item $src -destination $dst

and still get the SQL Agent error:

The error information returned by PowerShell is: 'Invalid Path: '\\serverpath\filename'. '. Process Exit Code -1. The step failed.

The following from PowerShell on the server box succeeds:

Copy-item "\\serverpath\filename" -destination "e:\path\filename"

Must be some permission issue, but I'm not smart enough to figure it out. Thx