You have just exported expenses from Pleo into your Xero, great, you're almost done!
You will need to ensure your transfers to Pleo are allocated
When the export is complete you can see them under Account Transactions
Enable Mark as Reconciled option in Xero.
The screen will refresh and a 'More' button will have appeared just above your transactions.
Select your transaction by clicking on the boxes to the left side of the expenses.
Click More ---> Mark as Reconciled
You can compare the current Statement Balance in Xero with the corresponding historic balance in Pleo in Export - Wallet