I want to help and provide exact information about your concern. However, I still need to gather more details about it. Can you tell me if you're trying to re-invite your employees to workforce or QuickBooks Time? Or you're referring to something else? I would appreciate getting more information from you. This way, I can provide the right amount and solution to your question.
Here are some articles that you can check for details about inviting employees to QuickBooks workforce or inviting them in QuickBooks Time: