Threshold for number of deactivations/deletions in target systems

Hi.

We have OIM 9.1 integrated with an HR-system (trusted source), as well as AD and Exchange (target systems). To compensate potential data errors from HR (eg. wrong end date is set on employees), we have a requirement to implement a threshold for number of deactivation/deletion processes to AD and Exchange. At the same time, it should be possible to override the threshold if these processes are valid. What would be best-practice approach to implement this requirement? 

Br,

Tin