Inside of Microsoft Dynamics 365 Business Central, go to the customer record and pull up the iSolutions Collections window under actions.
Select one or more invoices
On the Collections form below, you can select one or more invoices to pay. Once you have selected the invoices to be paid, simply click on the payments button highlighted.
Select the credit card or ACH token to use for paying the multiple invoices and hit the Capture button. Once the payment is verified, the cash journal will be created with the option to automatically post.