Automatically synchronize IdM with systems

Hello

i have searched in the forum, but did not find the right answer to my qyestion. And i am sorry if it exist and i did not see it.

We have IdM connected to several ABAP/HANA/Java systems. When we create the repositories, we run the initial loads.

But in the systems we keep creating new roles. What are the best practices to update IdM with the new modifications? Do i have to schedule all initial loads to run regurarly everyday ?

Thanks for your answers and help

Y.