1. Configure the state andcountry values you want to use in your org.We recomment this step because it gives you the opportunity to customizestate and country values. It ensures that state and country data continuesto work with the third-party systems you have integrated withSalesforce.
2. Scan your org’s dataand customizations.Convert data and update customizations, such as list views, reports, andworkflow rules, so that they continue to work with the new field type.
3. Convert existingdata.The conversion process lets you map the various values in your org tostandard picklist values. For example, map U.S., USA, and United States toUS.
4. Turn on the picklists for your users.If you turn on state and country picklists without configuring values, scanning your org, and converting existingdata, users can use the picklists in new records. However, all existing data is incompatible with the new format,which could compromise data consistency and integrity across the two field formats.
5. Optionally, rescan and fix customizations or records that have been created or edited since your first scan.