How to make a list from an absence of an association?
SOLVE
For a sales data migration task, It would be very useful to be able to make a list of contacts (with certain properties) who DON'T have an active deal. This would allow our folks to identify accounts that may have had issues in the migration. I can see how to add deal filters to a contact list, but no way to filter to only the contacts without a deal. Is this even possible?