I need to contact all of our accounts that have a specific insurance plan. We have received notification that as of January 2019 this plan will no longer be available so we want to send a letter to just those patients that will be affected. Through Solution Reach we can send a newsletter type email to them but this only addresses the patients that have given us an email address. I need a report that will show me all accounts for a specified insurance plan that have not given us an email address. I have been trying to figure out how to do this through Accounts user selected reports however I have been unsuccessful. Any help?