I've been trying to get scanstate and loadstate to backup to a server but everytime I try it returns error code 27: Invalid store path; check the store parameter and/or file system permissions. I have shared the folder out to allow everyone and domain computers full control. I can run the scanstate/loadstate with the exact same parameters on the local machine.

Invoke-Command -ComputerName $sourceComputer -ScriptBlock{C:\USMTFiles\scanstate.exe \\server\migstore /i:c:\usmtfiles\MigUser.xml}