Applications :: Preventing Invisible Files When Saving Directly From Excel To Network Drive

I work in a cross platform environment (windows/mac) where we typically save common files to a shared network drive. I've found when I save a file directly from excel (as opposed to saving it locally, then copying it over) it created an invisible ._filename file in the same directory. I know it's a property/resource file for the file that I just created, but it's a little confusing for some windows users and just clutters up the share directory. Is there any way to prevent the creation of the ._filename file while still saving directly from excel?

(I'd prefer not to save locally, then move to network drive - it's cleaner for me if I can just save directly) So far, I've found that this only happens with MS Office. I've opened a sql file in textwrangler and komodo, edited it, and saved it to the network and no invisible files are created.

NOTE: this is different the the fix that apple had published regarding not creating DS_Store files - that refers to copying files from the finder to a network drive and I don't have any problems with that.