Hi,
I thought about it and as per my opinion this is not a simple problem.
You can get the count on update of a Marketing List.
However, Actual time can change at anytime a new record is created, updated or deleted.
Let's assume you create a Dynamics Marketing list targeting Accounts with following criteria:
- Status Reason equals Active
- State equals TX (Texas)
When you create the marketing list, count was 10 records.
Then another account from Texas is created and count is 11. However, marketing list is not updated, hence the count on the list is still 10.
That means, you need to refresh the count every time a record is changed as per the criteria.
If you need an estimate number of records, then it might work, but it is very hard to get the actuals when the dashboard/view is loaded.