A very common request from customers is to find records WITHOUT a certain related record. Today I need to make a custom report for that. I think it would be great to be able to create views etc based on NOT IN statements in an advanced find. That could easily be used for customers to set up even more dynamics marketing lists too.
Thank you for your feedback. This is a great suggestion! We will consider this in our roadmap.
Sincerely,
Neeraj Nandwana
PM, Microsoft