To open the post-processing options, click on the 'Office post-processing options' in the Export Items WIzard.

This then opens the post-processing options dialog.

Select the 'Unhide workbook' option to unhide the workbook if it is hidden when exported. Select the 'Protect workbook' option and enter a password to protect the exported Microsoft Excel files.
Select the 'Protect document' option and enter a password to protect the exported Microsoft Word files.

