How can I call the Openfiles.exe (which is on the server 2008 file server) remotely from a computer to see which files are open by the users? I also need to have it login as the domain admin user in the parameters.
Openfiles can do a server direct. You don't have to run it remotely.
From Help openfiles /query /?
OPENFILES /Query /S system /U username /P password /NH