Learn how to upload a universal suppression list to Daisychain
You can upload a list of phone numbers to be opted out from all your campaigns in Daisychain. To do this, create a spreadsheet with a "phone number" column and an "SMS Opt Out" column to upload. Make sure to set the value of "SMS Opt Out" to "TRUE" on each row. Your upload will look like this once you match the fields:
Next, on the merge step, choose the "overwrite" option.
Once uploaded, your list will be opted out in Daisychain.