Count Based on Join Date

Hi, I need help on analysis based on their join date.

Example: Policy holder name (Chung Chee Ching), joined on 12/02/2020. Every policy holder have a fixed 84 days recruitment period to recruit new policy holders.

Join date: 12/02/2020
Due date: 6/5/2020

If there is any recruitment for Chung Chee Ching, it will only count within the recruitment period.
In this excel, there are total 3 appeared. However, the final result should be 2 based on the due date given for each policy holder who joined.