If you would like to set a default export when sending your expense reports in the drop-down, please do the following:
From Settings:
1. Go to Settings > Personal Settings > Reports
2. Mouse over the existing setting (Ie. NetSuite)
4. Choose the Make Default link. - A "check" will show up next to your new default.
From An Expense Report:
1. Choose Change Settings
2. Mouse over the existing setting (Ie. NetSuite Employee Center)
3. Choose the Make Default link - A "check" will show up next to your new default.