Should global constant MX_RECONCILE be used in IdM 7.2 SP9?

Hi Experts

In IDM 7.2 SP9 should MX_RECONCILE be used?

I currently have this set to FALSE but the "Reconcile dirty entries" job is also not enabled and not running on scheduled basis.

The issue my client currently has is that when a role or privilege(ABAP) is added to an existing business role which is already assigned to a user(s) those users are not getting the additional roles/privileges in the backend target systems.

Is this because the "Reconcile dirty entries" is not running? Should this be running on a regular basis? What is the SAP best practise recommendation?

Please could you assist.

Thanks

Ran