How to Exclude Dunning Letters from Dunning Plan when Dunning Level - Delinquency

Hi folks

I have a customer that is currently using Dunning Plans to collect their overdue debt

Dunning Level = Delinquency 

Type = Staged Dunning

The majority of their customers are using the same Dunning Plan and all have the same profile class assigned

However, they have a requirement to exclude 73 customers from Dunning that are currently included

I know you can exclude an invoice from dunning via Collections -> Collections -> Actions -> "Exclude from dunning" in Action field

and depending at what level you have queried your data back  (e.g Customer,  Account, Bill To, Delinquency) will be the level at which Dunning is excluded.