How to add rows to a new custom table based on values in other table? Options

[MrDax]

Hello,

I'm stuck in one of the business use case where we need to add duplicate entries in a new custom table from the inputs given in other table.

e.q. consider i have a table with

Subscriber
Effective_date
Expiriation_date
Service_Code

Now i want to dynamically create a custom table which will have duplicate entries with the same
Subscriber
Effective_date
Expiriation_date
Service_Code
BUT I NEED ALSO
a new columns of the dates between date being "Effective_date" & "Expiriation_date" so I could filter and see how much month he was subscriber until he left

right know I did this:

but instead of 3 - which is the number of month until the customer left, I want to see the months between..
May
June
July

how can I do this??

thanks a lot!!!