The data, as shown in the Rental Customer Portal, is managed by the rental company in D365 FO, in Rental order management.
In the Rental Customer Portal, this data is shown:
From the Rental Customer Portal, cases can be created for several reasons and from several places. Cases can be created, for example, to report damage to rented equipment, to request a change of the rental period, or to ask questions on an invoice. You can work on these cases in D365 FO.