Explanation: It is possible for a user to be created in a sandbox but not be created in a production environment. A user’s username must be unique across all sandboxes and production environments. A user can have the same email across multiple environments.
Explanation: It is possible for a user to be created in a sandbox but not be created in a production environment. A user’s username must be unique across all sandboxes and production environments. A user can have the same email across multiple environments.