Migrate Community Users Between Licenses
Here are some of the links to help you with your License transformation process. You can move community users between certain licenses using Data Loader Mass change User License Type Experience Cloud Licenses Eligible for Upgrades - Help And Training Community Migrate Community Users Between Licenses ( https://help.salesforce.com/articleView?id=networks_migrate_users_between_licenses.htm&type=5 ). Upgrade Community User Licenses ( Help And Training Community ). Mass disable portal users with Data Loader - https://help.salesforce.com/s/articleView?id=000386423&type=1