The > null does not work in the quotes. It sees the > null as the batch filename.
The robocopy no output worked!!!
Here is the new batch file:
robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np c:\EnvBackup c:\offsite_backup\EnvBackup
robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np c:\shares c:\offsite_backup\shares
robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np c:\Quickbooks_Backup c:\offsite_backup\Quickbooks_Backup