We back up our exchange server every 2 hours to an offsite backup server that is not in the domain. I've written a simple batch file to rename the differential backup according to the date and time and then move it to the offsite server (mapped as f:\). Everthing works fine when the batch file is run from the prompt, but it doesn't move the file when run from the Task Scheduler. We've called Microsoft and they couldn't figure it out either. Any suggestions?