Unless you have specific governance requirement to track changes to the dynamic groups themselves, I think you would have far better luck using a Change Workflow to trap and notify on the changes to the attributes that are used by the membership rules.
Thanks for the reply — that makes sense. Could you share an example of how you’d implement a Change Workflow to trap and notify on changes to the attributes used by the dynamic membership rules?
I haven’t tried capturing change history automatically through a workflow before, and I can see how that would be really powerful.
Have a look at this part of the documentation that explains how to setup the start condition for a Change Workflow
An alternative, if you have a SIEM solution that already handles alerting and event notifications, is to forward the Active Roles Admin Service event logs to your SIEM and let it handle that. You can filter for Event ID 1526 which is for "members removed from group" and the event details includes the group name and the removed member(s).