Can production data be put in the sandbox and transferred to the live instance? For example, can I add my employees and then keep them?
Once the POS is integrated with Restaurant365, the employee records will flow through with the information that is provided in the POS.
For more information on what is generally included with the POS Integration, please reference this support article reviewing the POS Integration Overview.
For more information on Employees & Team Members, there are several support articles that can be found here in this Support Article Folder including Employee Setup and Employee Record.