If you go to the tab Settings - Expense management - Report workflow - Advanced settings, you will be able to choose this settings: 

Reporting currency - choose the reporting currency on your company. 

Exchange rate adjustment - This setting means that the percentage you add is automatically added or removed when the user creates an expense with another currency.

Maximum size of receipt image - Enter a value if you want the users to have a maximum size of the receipt image

Maximum number of expenses in report - Enter a value if you want the users for example only submit five expenses per report. 

Do not use tax accounting for abroad purchases - Mark the box if you don't want abroad purchases to use TAX. 

Fail on error when sending reports in bulk - If some report has an error when you going to generate the file, all reports will stopp and the the job will be interrupted.

Don't forget to Save when you are done.