When upgrading from Samba 3 to Samba 4, which statement is true? (Select THREE correct answers)

Focusing on the chosen answer, the statement about user profiles remaining unchanged is accurate when upgrading from Samba 3 to Samba 4. This is because user profiles are typically stored separately from the Samba configuration itself and, unless specifically altered during the upgrade process, they should remain intact. This allows for continuity for users, as their personal files, application settings, and preferences are preserved, ensuring a smoother transition into the new environment without the need for users to reconfigure their settings.

In the context of the other options, while they provide relevant information, they are not applicable in the same way. For example, when moving to Samba 4, it's essential for all machines to re-join the new domain to properly interact with the upgraded domain controller and leverage the improvements in authentication and directory services. Samba does not automatically configure NTP for time synchronization; rather, it can integrate with existing services to ensure accurate timekeeping, which might be a separate configuration step. Lastly, the migration of user and machine accounts into the new database is typically part of the upgrade process but may require careful planning and execution under certain circumstances to ensure all existing accounts and permissions are appropriately transitioned.

Understanding these aspects highlights the importance of proper migration planning when upgrading Samba, assuring that user