You cannot run this command line utility from a network location. To register Windows Server Migration Tools, copy the deployment ...

You cannot run this command line utility from a network location. 
To register Windows Server Migration Tools, copy the deployment folder to a local drive on the source computer that is running Windows Server 2012, Windows Server 2008 R2, Windows Server 2008, or Windows Server 2003, and run this command again.
To create a deployment folder for computers that are running older releases of Windows Server, install Windows Server Migration Tools on Windows Server 2012 R2, and use the command line utility located at %Windir%\System32\ServerMigrationTools\SmigDeploy.exe.
For more information, see the Windows Server Migration Tool Installation, Access and Removal guide online.