Hello,
Please try the following suggestiosn to further troubleshoot this issue.
1. Please make the changes suggested in the following technote.
Title:
Jobs that are not set to use Advanced Open File Option (AOFO) fail with : OFO: Initialization failure on: "\\SERVER\C:", OFO: Not authorized to run Advance Open File Operations
http://support.veritas.com/docs/255074
2. Ensure that Backup exec Service Account has domain admin rights as well as local admin rights on remote servers that you are trying to backup.
3. If the above does not help, try uninstalling and reinstalling AOFO. Please reboot the server after both installation and uninstallation.
Title:
How to install and uninstall the Advanced Open File Option to remote Windows servers from the command prompt
http://support.veritas.com/docs/253620
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