To copy a lead from one rental to another:
(1) Click into the rental where the lead is currently.
(2) At the right edge of the lead row is the 3-dot button like this.
(3) Click that and select "Copy Lead."
(4) On the next page select the rental address and click the Copy Lead button.
The lead will now be a lead on the selected rental, too. You can then invite them to schedule a viewing.