How to generate a list of parishioners who do not want to receive envelopes
1. Go to Reports, then select Census Menu → Family Filtering and Sorting
2. Set the Registration status you would like (probably "both"), then select "No Envelopes" for Envelopes?, and you can select the blank space (above Active) for the Family/Work Group or select the Group you would like. Then select Show Results:
4. That will generate a list that you can then copy and paste into Excel.