1. Navigate to Contacts > Individuals
  2. Click Advanced Search
  3. Create the query to make up the list of individuals you want to be in the subscriber base
  4. Click Run Query
  5. Select the contacts within the query
  6. Click Batch Update
  7. Choose Update Selected Record(s) or Update All Query Records and Profile Fields/Segmentation/eNewsletter
  8. Click Continue
  9. Scroll down and click Next
  10. Select eNewsletter and click Save