To view an expense receipt in back office, follow the steps below.
Go to Back Office, then click CoreExpense.
Click Enquiry, then Expense Trip Enquiry.
Enter the Trip ID and tick all the options on the right side.
Tab down to bring back the trip and highlight the trip ID.
Click Trip Detail at the bottom of the screen, then View Receipt.
These steps above will allow you to download receipt attachments on an individual basis. It is not possible to bulk download receipt attachments.