Once you have integrated your CRM and synced specific lists, you can easily add new fields to those lists whenever needed.
- Navigate to Contacts > Marketing Lists
- Click the drop-down next to the list in question
- Choose Import/Export
- Select CRM Sync Setup (the name will vary by CRM)
- Click Add List Columns
- Select the new fields you wish to import and click Save
- If desired, click Run Now to import immediately