If this will be automated using SQLAgent on another domain may give issues with permissions of the account SQLAgent is using(sorry I haven't tried but a trust between the domains should help you around ask an NT Admin who has done this to help). If on the same domain then the account SQLAgent is running under has to have access to that machines and the file path itself.
"Don't roll your eyes at me. I will tape them in place." (Teacher on Boston Public)