Note: This action is only available to Admin Users. To learn more, click here.
You can update all existing data (deals/people/organizations) with a visibility setting under Settings > Users & Permissions. Once you’re there, select a default visibility to the type of record you're trying to map onto. You'll then be given a prompt, asking if you'd like the system to map this visibility setting on to every record in the system. You can select OK or Cancel.
Selecting OK will map the new visibility setting to every record.
Selecting cancel will just set your new default setting for all future records, but not map that visibility setting onto any of your records.
If you’re not an admin user, or need to only update a handful of records at once, then use the bulk editing features in the list view to change the “visible-to” settings.