Hello Materl5755, Express Invoice does not have an accounting feature to update your bank account. If the payment has not reflected in your bank records, then you may want to contact your bank or ask the customer a transaction confirmation number so you can check with the bank.
Once you have the confirmation for the payment from your bank, you may go to Express Invoice, click on View > Payments, select the payment for that particular invoice, click on Edit, confirm the payment method is set to Bank Deposit, enter the reference number and then click on Record to save the changes.